90778392 has 48 divisors (see below), whose sum is σ = 247679640. Its totient is φ = 30035328.

The previous prime is 90778379. The next prime is 90778393. The reversal of 90778392 is 29387709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90778393) 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, 5263 + ... + 14465.

Almost surely, 2^90778392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90778392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123839820).

90778392 is an abundant number, since it is smaller than the sum of its proper divisors (156901248).

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

90778392 is a wasteful number, since it uses less digits than its factorization.

90778392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9352 (or 9345 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 90778392 is about 9527.7695186229. The cubic root of 90778392 is about 449.4287269300.

The spelling of 90778392 in words is "ninety million, seven hundred seventy-eight thousand, three hundred ninety-two".