990400510 has 64 divisors (see below), whose sum is σ = 2038950144. Its totient is φ = 343123200.

The previous prime is 990400471. The next prime is 990400531. The reversal of 990400510 is 15004099.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191377 + ... + 196483.

It is an arithmetic number, because the mean of its divisors is an integer number (31858596).

Almost surely, 2^990400510 is an apocalyptic number.

990400510 is an abundant number, since it is smaller than the sum of its proper divisors (1048549634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

990400510 is a wasteful number, since it uses less digits than its factorization.

990400510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5209.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 990400510 is about 31470.6293232277. The cubic root of 990400510 is about 996.7898761314.

The spelling of 990400510 in words is "nine hundred ninety million, four hundred thousand, five hundred ten".