139345920 has 360 divisors, whose sum is σ = 572505024. Its totient is φ = 31850496.

The previous prime is 139345901. The next prime is 139345939. The reversal of 139345920 is 29543931.

It is a happy number.

It is a Jordan-Polya number, since it can be written as 9! ⋅ 4! ⋅ (2!)⁴.

139345920 is a `hidden beast` number, since 1 + 39 + 34 + 592 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (139345901) and next prime (139345939).

It is a tau number, because it is divible by the number of its divisors (360).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19906557 + ... + 19906563.

Almost surely, 2^139345920 is an apocalyptic number.

139345920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139345920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286252512).

139345920 is an abundant number, since it is smaller than the sum of its proper divisors (433159104).

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

139345920 is an frugal number, since it uses more digits than its factorization.

139345920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 139345920 is about 11804.4872823855. The cubic root of 139345920 is about 518.4395031625.

The spelling of 139345920 in words is "one hundred thirty-nine million, three hundred forty-five thousand, nine hundred twenty".