90140836 has 6 divisors (see below), whose sum is σ = 157746470. Its totient is φ = 45070416.

The previous prime is 90140821. The next prime is 90140867. The reversal of 90140836 is 63804109.

It can be written as a sum of positive squares in only one way, i.e., 60372900 + 29767936 = 7770^2 + 5456^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90140798 and 90140807.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11267601 + ... + 11267608.

Almost surely, 2^90140836 is an apocalyptic number.

It is an amenable number.

90140836 is a deficient number, since it is larger than the sum of its proper divisors (67605634).

90140836 is a wasteful number, since it uses less digits than its factorization.

90140836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22535213 (or 22535211 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 90140836 is about 9494.2527878712. The cubic root of 90140836 is about 448.3741095413.

The spelling of 90140836 in words is "ninety million, one hundred forty thousand, eight hundred thirty-six".