90715840 has 28 divisors (see below), whose sum is σ = 216017856. Its totient is φ = 36286208.

The previous prime is 90715829. The next prime is 90715843. The reversal of 90715840 is 4851709.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 90715796 and 90715805.

It is not an unprimeable number, because it can be changed into a prime (90715843) 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 3 ways as a sum of consecutive naturals, for example, 141424 + ... + 142063.

Almost surely, 2^90715840 is an apocalyptic number.

It is an amenable number.

90715840 is an abundant number, since it is smaller than the sum of its proper divisors (125302016).

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

90715840 is a wasteful number, since it uses less digits than its factorization.

90715840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283504 (or 283494 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 90715840 is about 9524.4863378557. The cubic root of 90715840 is about 449.3254750265.

The spelling of 90715840 in words is "ninety million, seven hundred fifteen thousand, eight hundred forty".