990040630 has 16 divisors (see below), whose sum is σ = 1785583440. Its totient is φ = 395236192.

The previous prime is 990040627. The next prime is 990040631. The reversal of 990040630 is 36040099.

It is a junction number, because it is equal to n+sod(n) for n = 990040592 and 990040601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990040631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92164 + ... + 102343.

It is an arithmetic number, because the mean of its divisors is an integer number (111598965).

Almost surely, 2^990040630 is an apocalyptic number.

990040630 is a deficient number, since it is larger than the sum of its proper divisors (795542810).

990040630 is a wasteful number, since it uses less digits than its factorization.

990040630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195023.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 990040630 is about 31464.9110915636. The cubic root of 990040630 is about 996.6691276075.

The spelling of 990040630 in words is "nine hundred ninety million, forty thousand, six hundred thirty".