400662945 has 48 divisors (see below), whose sum is σ = 710079552. Its totient is φ = 208932480.

The previous prime is 400662943. The next prime is 400662961. The reversal of 400662945 is 549266004.

It is not a de Polignac number, because 400662945 - 2¹ = 400662943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400662943) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 622794 + ... + 623436.

It is an arithmetic number, because the mean of its divisors is an integer number (14793324).

Almost surely, 2^400662945 is an apocalyptic number.

400662945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400662945 is a deficient number, since it is larger than the sum of its proper divisors (309416607).

400662945 is a wasteful number, since it uses less digits than its factorization.

400662945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 939 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 400662945 is about 20016.5667635586. The cubic root of 400662945 is about 737.2131267678.

The spelling of 400662945 in words is "four hundred million, six hundred sixty-two thousand, nine hundred forty-five".