902774090 has 8 divisors (see below), whose sum is σ = 1624993380. Its totient is φ = 361109632.

The previous prime is 902774071. The next prime is 902774099. The reversal of 902774090 is 90477209.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 724524889 + 178249201 = 26917^2 + 13351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (902774099) 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, 45138695 + ... + 45138714.

Almost surely, 2^902774090 is an apocalyptic number.

902774090 is a deficient number, since it is larger than the sum of its proper divisors (722219290).

902774090 is a wasteful number, since it uses less digits than its factorization.

902774090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90277416.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 902774090 is about 30046.1992604722. The cubic root of 902774090 is about 966.4803502720.

The spelling of 902774090 in words is "nine hundred two million, seven hundred seventy-four thousand, ninety".