139361436 has 18 divisors (see below), whose sum is σ = 352274832. Its totient is φ = 46453800.

The previous prime is 139361389. The next prime is 139361437. The reversal of 139361436 is 634163931.

139361436 is a `hidden beast` number, since 1 + 3 + 9 + 3 + 614 + 36 = 666.

139361436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3871151 = 139361436 / (1 + 3 + 9 + 3 + 6 + 1 + 4 + 3 + 6).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 139361436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139361437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1935540 + ... + 1935611.

It is an arithmetic number, because the mean of its divisors is an integer number (19570824).

Almost surely, 2^139361436 is an apocalyptic number.

It is an amenable number.

139361436 is an abundant number, since it is smaller than the sum of its proper divisors (212913396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139361436 is a wasteful number, since it uses less digits than its factorization.

139361436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871161 (or 3871156 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 139361436 is about 11805.1444717970. The cubic root of 139361436 is about 518.4587449860.

The spelling of 139361436 in words is "one hundred thirty-nine million, three hundred sixty-one thousand, four hundred thirty-six".