400491290 has 32 divisors (see below), whose sum is σ = 732084480. Its totient is φ = 157719744.

The previous prime is 400491241. The next prime is 400491313. The reversal of 400491290 is 92194004.

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, 483857 + ... + 484683.

It is an arithmetic number, because the mean of its divisors is an integer number (22877640).

Almost surely, 2^400491290 is an apocalyptic number.

400491290 is a deficient number, since it is larger than the sum of its proper divisors (331593190).

400491290 is a wasteful number, since it uses less digits than its factorization.

400491290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 400491290 is about 20012.2784809726. The cubic root of 400491290 is about 737.1078309515.

The spelling of 400491290 in words is "four hundred million, four hundred ninety-one thousand, two hundred ninety".