90028977250 has 16 divisors (see below), whose sum is σ = 168534245880. Its totient is φ = 36011590800.

The previous prime is 90028977229. The next prime is 90028977263. The reversal of 90028977250 is 5277982009.

It can be written as a sum of positive squares in 4 ways, for example, as 14116053721 + 75912923529 = 118811^2 + 275523^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90028977194 and 90028977203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180057705 + ... + 180058204.

Almost surely, 2^90028977250 is an apocalyptic number.

90028977250 is a deficient number, since it is larger than the sum of its proper divisors (78505268630).

90028977250 is a wasteful number, since it uses less digits than its factorization.

90028977250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360115926 (or 360115916 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 90028977250 in words is "ninety billion, twenty-eight million, nine hundred seventy-seven thousand, two hundred fifty".