139912920 has 320 divisors, whose sum is σ = 557568000. Its totient is φ = 30792960.

The previous prime is 139912901. The next prime is 139912931. The reversal of 139912920 is 29219931.

It is a happy number.

139912920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 702981 + ... + 703179.

It is an arithmetic number, because the mean of its divisors is an integer number (1742400).

Almost surely, 2^139912920 is an apocalyptic number.

139912920 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 139912920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278784000).

139912920 is an abundant number, since it is smaller than the sum of its proper divisors (417655080).

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

139912920 is a wasteful number, since it uses less digits than its factorization.

139912920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 139912920 is about 11828.4791921870. The cubic root of 139912920 is about 519.1417301453.

The spelling of 139912920 in words is "one hundred thirty-nine million, nine hundred twelve thousand, nine hundred twenty".