90780408 has 48 divisors (see below), whose sum is σ = 260329680. Its totient is φ = 28479744.

The previous prime is 90780407. The next prime is 90780419. The reversal of 90780408 is 80408709.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90780407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35860 + ... + 38307.

It is an arithmetic number, because the mean of its divisors is an integer number (5423535).

Almost surely, 2^90780408 is an apocalyptic number.

It is an amenable number.

90780408 is an abundant number, since it is smaller than the sum of its proper divisors (169549272).

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

90780408 is a wasteful number, since it uses less digits than its factorization.

90780408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74196 (or 74189 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 90780408 is about 9527.8753140456. The cubic root of 90780408 is about 449.4320538657.

The spelling of 90780408 in words is "ninety million, seven hundred eighty thousand, four hundred eight".