90402930 has 24 divisors (see below), whose sum is σ = 235047852. Its totient is φ = 24107424.

The previous prime is 90402929. The next prime is 90402967. The reversal of 90402930 is 3920409.

It can be written as a sum of positive squares in 2 ways, for example, as 90383049 + 19881 = 9507^2 + 141^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90402894 and 90402903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502149 + ... + 502328.

Almost surely, 2^90402930 is an apocalyptic number.

90402930 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

90402930 is an abundant number, since it is smaller than the sum of its proper divisors (144644922).

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

90402930 is a wasteful number, since it uses less digits than its factorization.

90402930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004490 (or 1004487 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 90402930 is about 9508.0455404883. The cubic root of 90402930 is about 448.8082540638.

The spelling of 90402930 in words is "ninety million, four hundred two thousand, nine hundred thirty".