400426267472 has 80 divisors (see below), whose sum is σ = 974880079872. Its totient is φ = 154781746560.

The previous prime is 400426267469. The next prime is 400426267477. The reversal of 400426267472 is 274762624004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400426267477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1123148 + ... + 1436075.

Almost surely, 2^400426267472 is an apocalyptic number.

It is an amenable number.

400426267472 is an abundant number, since it is smaller than the sum of its proper divisors (574453812400).

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

400426267472 is a wasteful number, since it uses less digits than its factorization.

400426267472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559376 (or 2559370 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 44.

The spelling of 400426267472 in words is "four hundred billion, four hundred twenty-six million, two hundred sixty-seven thousand, four hundred seventy-two".