401253634 has 16 divisors (see below), whose sum is σ = 622230840. Its totient is φ = 193933440.

The previous prime is 401253583. The next prime is 401253637. The reversal of 401253634 is 436352104.

It can be written as a sum of positive squares in 4 ways, for example, as 288830025 + 112423609 = 16995^2 + 10603^2 .

It is a super-2 number, since 2×401253634² = 322008957596411912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401253637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13509 + ... + 31384.

Almost surely, 2^401253634 is an apocalyptic number.

401253634 is a deficient number, since it is larger than the sum of its proper divisors (220977206).

401253634 is a wasteful number, since it uses less digits than its factorization.

401253634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45045.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 401253634 is about 20031.3163321835. The cubic root of 401253634 is about 737.5752348413.

The spelling of 401253634 in words is "four hundred one million, two hundred fifty-three thousand, six hundred thirty-four".