400425556 has 12 divisors (see below), whose sum is σ = 701040340. Its totient is φ = 200128320.

The previous prime is 400425541. The next prime is 400425563. The reversal of 400425556 is 655524004.

It can be written as a sum of positive squares in 2 ways, for example, as 146023056 + 254402500 = 12084^2 + 15950^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9771 + ... + 29938.

Almost surely, 2^400425556 is an apocalyptic number.

It is an amenable number.

400425556 is a deficient number, since it is larger than the sum of its proper divisors (300614784).

400425556 is a wasteful number, since it uses less digits than its factorization.

400425556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42234 (or 42232 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 400425556 is about 20010.6360718494. The cubic root of 400425556 is about 737.0675007383.

The spelling of 400425556 in words is "four hundred million, four hundred twenty-five thousand, five hundred fifty-six".