139741920 has 144 divisors (see below), whose sum is σ = 486132192. Its totient is φ = 36541440.

The previous prime is 139741919. The next prime is 139741957. The reversal of 139741920 is 29147931.

It is a tau number, because it is divible by the number of its divisors (144).

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 23 ways as a sum of consecutive naturals, for example, 75405 + ... + 77235.

It is an arithmetic number, because the mean of its divisors is an integer number (3375918).

Almost surely, 2^139741920 is an apocalyptic number.

139741920 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 139741920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243066096).

139741920 is an abundant number, since it is smaller than the sum of its proper divisors (346390272).

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

139741920 is a wasteful number, since it uses less digits than its factorization.

139741920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 139741920 is about 11821.2486650100. The cubic root of 139741920 is about 518.9301475259.

The spelling of 139741920 in words is "one hundred thirty-nine million, seven hundred forty-one thousand, nine hundred twenty".