139155456 has 192 divisors, whose sum is σ = 424569600. Its totient is φ = 40140800.

The previous prime is 139155413. The next prime is 139155469. The reversal of 139155456 is 654551931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1959901 + ... + 1959971.

It is an arithmetic number, because the mean of its divisors is an integer number (2211300).

Almost surely, 2^139155456 is an apocalyptic number.

139155456 is a gapful number since it is divisible by the number (16) 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 139155456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212284800).

139155456 is an abundant number, since it is smaller than the sum of its proper divisors (285414144).

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

139155456 is a wasteful number, since it uses less digits than its factorization.

139155456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 116 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 139155456 is about 11796.4170831655. The cubic root of 139155456 is about 518.2031869864.

The spelling of 139155456 in words is "one hundred thirty-nine million, one hundred fifty-five thousand, four hundred fifty-six".