404256156240 has 80 divisors (see below), whose sum is σ = 1256258433600. Its totient is φ = 107538041856.

The previous prime is 404256156233. The next prime is 404256156277. The reversal of 404256156240 is 42651652404.

It is a tau number, because it is divible by the number of its divisors (80).

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, 1961010 + ... + 2157329.

It is an arithmetic number, because the mean of its divisors is an integer number (15703230420).

Almost surely, 2^404256156240 is an apocalyptic number.

404256156240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404256156240 is an abundant number, since it is smaller than the sum of its proper divisors (852002277360).

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

404256156240 is a wasteful number, since it uses less digits than its factorization.

404256156240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118764 (or 4118758 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 404256156240 in words is "four hundred four billion, two hundred fifty-six million, one hundred fifty-six thousand, two hundred forty".