139505364 has 36 divisors (see below), whose sum is σ = 356608980. Its totient is φ = 45978240.

The previous prime is 139505351. The next prime is 139505369. The reversal of 139505364 is 463505931.

It can be written as a sum of positive squares in 2 ways, for example, as 20520900 + 118984464 = 4530^2 + 10908^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×139505364³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139505369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18567 + ... + 24974.

It is an arithmetic number, because the mean of its divisors is an integer number (9905805).

Almost surely, 2^139505364 is an apocalyptic number.

It is an amenable number.

139505364 is an abundant number, since it is smaller than the sum of its proper divisors (217103616).

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

139505364 is a wasteful number, since it uses less digits than its factorization.

139505364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43640 (or 43635 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 139505364 is about 11811.2388850620. The cubic root of 139505364 is about 518.6371660722.

The spelling of 139505364 in words is "one hundred thirty-nine million, five hundred five thousand, three hundred sixty-four".