990400862 has 16 divisors (see below), whose sum is σ = 1624633200. Its totient is φ = 449077440.

The previous prime is 990400847. The next prime is 990400871. The reversal of 990400862 is 268004099.

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, 46037 + ... + 64032.

It is an arithmetic number, because the mean of its divisors is an integer number (101539575).

Almost surely, 2^990400862 is an apocalyptic number.

990400862 is a deficient number, since it is larger than the sum of its proper divisors (634232338).

990400862 is a wasteful number, since it uses less digits than its factorization.

990400862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110491.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 990400862 is about 31470.6349157433. The cubic root of 990400862 is about 996.7899942217.

The spelling of 990400862 in words is "nine hundred ninety million, four hundred thousand, eight hundred sixty-two".