90400780 has 24 divisors (see below), whose sum is σ = 192956400. Its totient is φ = 35567040.

The previous prime is 90400763. The next prime is 90400811. The reversal of 90400780 is 8700409.

It is an unprimeable number.

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, 35830 + ... + 38269.

It is an arithmetic number, because the mean of its divisors is an integer number (8039850).

Almost surely, 2^90400780 is an apocalyptic number.

It is an amenable number.

90400780 is an abundant number, since it is smaller than the sum of its proper divisors (102555620).

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

90400780 is a wasteful number, since it uses less digits than its factorization.

90400780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74169 (or 74167 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 90400780 is about 9507.9324776736. The cubic root of 90400780 is about 448.8046961209.

The spelling of 90400780 in words is "ninety million, four hundred thousand, seven hundred eighty".