400853634 has 32 divisors (see below), whose sum is σ = 825130176. Its totient is φ = 129729600.

The previous prime is 400853633. The next prime is 400853639. The reversal of 400853634 is 436358004.

It is a junction number, because it is equal to n+sod(n) for n = 400853595 and 400853604.

It is not an unprimeable number, because it can be changed into a prime (400853633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119784 + ... + 123084.

It is an arithmetic number, because the mean of its divisors is an integer number (25785318).

Almost surely, 2^400853634 is an apocalyptic number.

400853634 is an abundant number, since it is smaller than the sum of its proper divisors (424276542).

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

400853634 is a wasteful number, since it uses less digits than its factorization.

400853634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 400853634 is about 20021.3294763360. The cubic root of 400853634 is about 737.3300630768.

The spelling of 400853634 in words is "four hundred million, eight hundred fifty-three thousand, six hundred thirty-four".