990874944 has 70 divisors (see below), whose sum is σ = 2937279114. Its totient is φ = 330289920.

The previous prime is 990874939. The next prime is 990874949. The reversal of 990874944 is 449478099.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (990874939) and next prime (990874949).

It can be written as a sum of positive squares in only one way, i.e., 958521600 + 32353344 = 30960^2 + 5688^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990874949) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 90387 + ... + 100754.

Almost surely, 2^990874944 is an apocalyptic number.

It is an amenable number.

990874944 is an abundant number, since it is smaller than the sum of its proper divisors (1946404170).

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

990874944 is a wasteful number, since it uses less digits than its factorization.

990874944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191165 (or 191146 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 990874944 is about 31478.1661473473. The cubic root of 990874944 is about 996.9490156277.

The spelling of 990874944 in words is "nine hundred ninety million, eight hundred seventy-four thousand, nine hundred forty-four".