400490252 has 6 divisors (see below), whose sum is σ = 700857948. Its totient is φ = 200245124.

The previous prime is 400490231. The next prime is 400490287. The reversal of 400490252 is 252094004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50061278 + ... + 50061285.

It is an arithmetic number, because the mean of its divisors is an integer number (116809658).

Almost surely, 2^400490252 is an apocalyptic number.

It is an amenable number.

400490252 is a deficient number, since it is larger than the sum of its proper divisors (300367696).

400490252 is a wasteful number, since it uses less digits than its factorization.

400490252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100122567 (or 100122565 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 400490252 is about 20012.2525468774. The cubic root of 400490252 is about 737.1071941348.

The spelling of 400490252 in words is "four hundred million, four hundred ninety thousand, two hundred fifty-two".