90866840 has 32 divisors (see below), whose sum is σ = 206022960. Its totient is φ = 36067200.

The previous prime is 90866801. The next prime is 90866843. The reversal of 90866840 is 4866809.

It is a super-2 number, since 2×90866840² = 16513565223171200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90866843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3431 + ... + 13910.

Almost surely, 2^90866840 is an apocalyptic number.

It is an amenable number.

90866840 is an abundant number, since it is smaller than the sum of its proper divisors (115156120).

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

90866840 is a wasteful number, since it uses less digits than its factorization.

90866840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17483 (or 17479 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 90866840 is about 9532.4099785941. The cubic root of 90866840 is about 449.5746433313.

The spelling of 90866840 in words is "ninety million, eight hundred sixty-six thousand, eight hundred forty".