400237400256 has 112 divisors (see below), whose sum is σ = 1099352640000. Its totient is φ = 128356365312.

The previous prime is 400237400239. The next prime is 400237400273. The reversal of 400237400256 is 652004732004.

It is an interprime number because it is at equal distance from previous prime (400237400239) and next prime (400237400273).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1448745 + ... + 1702743.

Almost surely, 2^400237400256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400237400256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549676320000).

400237400256 is an abundant number, since it is smaller than the sum of its proper divisors (699115239744).

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

400237400256 is a wasteful number, since it uses less digits than its factorization.

400237400256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254326 (or 254316 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 33.

The spelling of 400237400256 in words is "four hundred billion, two hundred thirty-seven million, four hundred thousand, two hundred fifty-six".