90277491028 has 12 divisors (see below), whose sum is σ = 163433389140. Its totient is φ = 43582236992.

The previous prime is 90277491023. The next prime is 90277491037. The reversal of 90277491028 is 82019477209.

It can be written as a sum of positive squares in 2 ways, for example, as 57421578384 + 32855912644 = 239628^2 + 181262^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90277491023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389127001 + ... + 389127232.

It is an arithmetic number, because the mean of its divisors is an integer number (13619449095).

Almost surely, 2^90277491028 is an apocalyptic number.

It is an amenable number.

90277491028 is a deficient number, since it is larger than the sum of its proper divisors (73155898112).

90277491028 is a wasteful number, since it uses less digits than its factorization.

90277491028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778254266 (or 778254264 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 90277491028 in words is "ninety billion, two hundred seventy-seven million, four hundred ninety-one thousand, twenty-eight".