990279736384 has 63 divisors (see below), whose sum is σ = 2003716755957. Its totient is φ = 485590619904.

The previous prime is 990279736361. The next prime is 990279736387. The reversal of 990279736384 is 483637972099.

The square root of 990279736384 is 995128.

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., 713889806400 + 276389929984 = 844920^2 + 525728^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990279736387) 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, 421933099 + ... + 421935445.

Almost surely, 2^990279736384 is an apocalyptic number.

990279736384 is the 995128-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990279736384

990279736384 is an abundant number, since it is smaller than the sum of its proper divisors (1013437019573).

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

990279736384 is an frugal number, since it uses more digits than its factorization.

990279736384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812 (or 2402 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 67.

The spelling of 990279736384 in words is "nine hundred ninety billion, two hundred seventy-nine million, seven hundred thirty-six thousand, three hundred eighty-four".