90839960 has 32 divisors (see below), whose sum is σ = 204690240. Its totient is φ = 36282624.

The previous prime is 90839953. The next prime is 90840017. The reversal of 90839960 is 6993809.

It is a Cunningham number, because it is equal to 9531²-1.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36929 + ... + 39311.

It is an arithmetic number, because the mean of its divisors is an integer number (6396570).

Almost surely, 2^90839960 is an apocalyptic number.

It is an amenable number.

90839960 is an abundant number, since it is smaller than the sum of its proper divisors (113850280).

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

90839960 is a wasteful number, since it uses less digits than its factorization.

90839960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347 (or 3343 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 90839960 is about 9530.9999475396. Note that the first 4 decimals coincide. The cubic root of 90839960 is about 449.5303082793.

The spelling of 90839960 in words is "ninety million, eight hundred thirty-nine thousand, nine hundred sixty".