400026857472 has 1248 divisors, whose sum is σ = 1479381096960. Its totient is φ = 105366159360.

The previous prime is 400026857411. The next prime is 400026857473. The reversal of 400026857472 is 274758620004.

It is a happy number.

400026857472 is a `hidden beast` number, since 4 + 0 + 0 + 0 + 2 + 6 + 8 + 574 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400026857473) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13794029554 + ... + 13794029582.

It is an arithmetic number, because the mean of its divisors is an integer number (1185401520).

Almost surely, 2^400026857472 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 400026857472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739690548480).

400026857472 is an abundant number, since it is smaller than the sum of its proper divisors (1079354239488).

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

400026857472 is a wasteful number, since it uses less digits than its factorization.

400026857472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 400026857472 in words is "four hundred billion, twenty-six million, eight hundred fifty-seven thousand, four hundred seventy-two".