990486784 has 81 divisors (see below), whose sum is σ = 2308110861. Its totient is φ = 422983680.

The previous prime is 990486769. The next prime is 990486787. The reversal of 990486784 is 487684099.

The square root of 990486784 is 31472.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 669360384 + 321126400 = 25872^2 + 17920^2 .

It is a super-3 number, since 3×990486784³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (990486787) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3524724 + ... + 3525004.

Almost surely, 2^990486784 is an apocalyptic number.

990486784 is the 31472-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990486784

990486784 is an abundant number, since it is smaller than the sum of its proper divisors (1317624077).

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

990486784 is an frugal number, since it uses more digits than its factorization.

990486784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The cubic root of 990486784 is about 996.8188188174.

The spelling of 990486784 in words is "nine hundred ninety million, four hundred eighty-six thousand, seven hundred eighty-four".