996931890 has 24 divisors (see below), whose sum is σ = 2592023148. Its totient is φ = 265848480.

The previous prime is 996931879. The next prime is 996931931. The reversal of 996931890 is 98139699.

It can be written as a sum of positive squares in 2 ways, for example, as 841406049 + 155525841 = 29007^2 + 12471^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5538421 + ... + 5538600.

Almost surely, 2^996931890 is an apocalyptic number.

996931890 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

996931890 is an abundant number, since it is smaller than the sum of its proper divisors (1595091258).

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

996931890 is a wasteful number, since it uses less digits than its factorization.

996931890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11077034 (or 11077031 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 996931890 is about 31574.2282566019. The cubic root of 996931890 is about 998.9762489581.

The spelling of 996931890 in words is "nine hundred ninety-six million, nine hundred thirty-one thousand, eight hundred ninety".