90772758 has 64 divisors (see below), whose sum is σ = 217218240. Its totient is φ = 27993600.

The previous prime is 90772757. The next prime is 90772777. The reversal of 90772758 is 85727709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90772751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55188 + ... + 56808.

It is an arithmetic number, because the mean of its divisors is an integer number (3394035).

Almost surely, 2^90772758 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90772758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108609120).

90772758 is an abundant number, since it is smaller than the sum of its proper divisors (126445482).

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

90772758 is a wasteful number, since it uses less digits than its factorization.

90772758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710 (or 1704 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 90772758 is about 9527.4738519715. The cubic root of 90772758 is about 449.4194290719.

The spelling of 90772758 in words is "ninety million, seven hundred seventy-two thousand, seven hundred fifty-eight".