400266646 has 8 divisors (see below), whose sum is σ = 646584624. Its totient is φ = 184738440.

The previous prime is 400266619. The next prime is 400266697. The reversal of 400266646 is 646662004.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 7697410 + ... + 7697461.

It is an arithmetic number, because the mean of its divisors is an integer number (80823078).

Almost surely, 2^400266646 is an apocalyptic number.

400266646 is a deficient number, since it is larger than the sum of its proper divisors (246317978).

400266646 is a wasteful number, since it uses less digits than its factorization.

400266646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15394886.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 400266646 is about 20006.6650394312. The cubic root of 400266646 is about 736.9699854055.

The spelling of 400266646 in words is "four hundred million, two hundred sixty-six thousand, six hundred forty-six".