139262928 has 80 divisors (see below), whose sum is σ = 415866240. Its totient is φ = 39333888.

The previous prime is 139262923. The next prime is 139262933. The reversal of 139262928 is 829262931.

139262928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139262923) and next prime (139262933).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 139262928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139262923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27576 + ... + 32232.

It is an arithmetic number, because the mean of its divisors is an integer number (5198328).

Almost surely, 2^139262928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139262928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207933120).

139262928 is an abundant number, since it is smaller than the sum of its proper divisors (276603312).

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

139262928 is a wasteful number, since it uses less digits than its factorization.

139262928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764 (or 4758 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 139262928 is about 11800.9714854329. The cubic root of 139262928 is about 518.3365582133.

The spelling of 139262928 in words is "one hundred thirty-nine million, two hundred sixty-two thousand, nine hundred twenty-eight".