990453786 has 16 divisors (see below), whose sum is σ = 2263894464. Its totient is φ = 282986784.

The previous prime is 990453727. The next prime is 990453817. The reversal of 990453786 is 687354099.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11791075 + ... + 11791158.

It is an arithmetic number, because the mean of its divisors is an integer number (141493404).

Almost surely, 2^990453786 is an apocalyptic number.

990453786 is an abundant number, since it is smaller than the sum of its proper divisors (1273440678).

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

990453786 is a wasteful number, since it uses less digits than its factorization.

990453786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23582245.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 990453786 is about 31471.4757518614. The cubic root of 990453786 is about 996.8077490440.

It can be divided in two parts, 99045 and 3786, that added together give a triangular number (102831 = T₄₅₃).

The spelling of 990453786 in words is "nine hundred ninety million, four hundred fifty-three thousand, seven hundred eighty-six".