400779952 has 40 divisors (see below), whose sum is σ = 798872976. Its totient is φ = 194670336.

The previous prime is 400779923. The next prime is 400780021. The reversal of 400779952 is 259977004.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 400779899 and 400779908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134058 + ... + 137014.

Almost surely, 2^400779952 is an apocalyptic number.

It is an amenable number.

400779952 is a deficient number, since it is larger than the sum of its proper divisors (398093024).

400779952 is a wasteful number, since it uses less digits than its factorization.

400779952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205 (or 3199 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 400779952 is about 20019.4893041756. The cubic root of 400779952 is about 737.2848834250.

The spelling of 400779952 in words is "four hundred million, seven hundred seventy-nine thousand, nine hundred fifty-two".