400266645 has 16 divisors (see below), whose sum is σ = 640872960. Its totient is φ = 213326784.

The previous prime is 400266619. The next prime is 400266697. The reversal of 400266645 is 546662004.

It is not a de Polignac number, because 400266645 - 2⁹ = 400266133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14991 + ... + 32019.

It is an arithmetic number, because the mean of its divisors is an integer number (40054560).

Almost surely, 2^400266645 is an apocalyptic number.

It is an amenable number.

400266645 is a deficient number, since it is larger than the sum of its proper divisors (240606315).

400266645 is a wasteful number, since it uses less digits than its factorization.

400266645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18604.

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

The square root of 400266645 is about 20006.6650144396. The cubic root of 400266645 is about 736.9699847918.

The spelling of 400266645 in words is "four hundred million, two hundred sixty-six thousand, six hundred forty-five".