400542166 has 16 divisors (see below), whose sum is σ = 610099200. Its totient is φ = 197189928.

The previous prime is 400542157. The next prime is 400542179. The reversal of 400542166 is 661245004.

It is a congruent number.

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, 57205 + ... + 63823.

It is an arithmetic number, because the mean of its divisors is an integer number (38131200).

Almost surely, 2^400542166 is an apocalyptic number.

400542166 is a deficient number, since it is larger than the sum of its proper divisors (209557034).

400542166 is a wasteful number, since it uses less digits than its factorization.

400542166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7083.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 400542166 is about 20013.5495602354. The cubic root of 400542166 is about 737.1390422089.

The spelling of 400542166 in words is "four hundred million, five hundred forty-two thousand, one hundred sixty-six".