90270906 has 32 divisors (see below), whose sum is σ = 205521408. Its totient is φ = 26165040.

The previous prime is 90270847. The next prime is 90270907. The reversal of 90270906 is 60907209.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90270907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28216 + ... + 31251.

It is an arithmetic number, because the mean of its divisors is an integer number (6422544).

Almost surely, 2^90270906 is an apocalyptic number.

90270906 is an abundant number, since it is smaller than the sum of its proper divisors (115250502).

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

90270906 is a wasteful number, since it uses less digits than its factorization.

90270906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59506.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 90270906 is about 9501.1002520761. The cubic root of 90270906 is about 448.5896684905.

The spelling of 90270906 in words is "ninety million, two hundred seventy thousand, nine hundred six".