90200902 has 24 divisors (see below), whose sum is σ = 152363736. Its totient is φ = 39996000.

The previous prime is 90200899. The next prime is 90200927. The reversal of 90200902 is 20900209.

It is a super-2 number, since 2×90200902² = 16272405443227208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5377 + ... + 14467.

It is an arithmetic number, because the mean of its divisors is an integer number (6348489).

Almost surely, 2^90200902 is an apocalyptic number.

90200902 is a deficient number, since it is larger than the sum of its proper divisors (62162834).

90200902 is a wasteful number, since it uses less digits than its factorization.

90200902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9156 (or 9145 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 90200902 is about 9497.4155431886. The cubic root of 90200902 is about 448.4736798750.

Adding to 90200902 its reverse (20900209), we get a palindrome (111101111).

It can be divided in two parts, 90200 and 902, that multiplied together give a square (81360400 = 9020²).

The spelling of 90200902 in words is "ninety million, two hundred thousand, nine hundred two".