90203906 has 16 divisors (see below), whose sum is σ = 153384000. Its totient is φ = 39441168.

The previous prime is 90203899. The next prime is 90203917. The reversal of 90203906 is 60930209.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90806 + ... + 91793.

It is an arithmetic number, because the mean of its divisors is an integer number (9586500).

Almost surely, 2^90203906 is an apocalyptic number.

90203906 is a deficient number, since it is larger than the sum of its proper divisors (63180094).

90203906 is a wasteful number, since it uses less digits than its factorization.

90203906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182633.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 90203906 is about 9497.5736901590. The cubic root of 90203906 is about 448.4786583913.

The spelling of 90203906 in words is "ninety million, two hundred three thousand, nine hundred six".