90453090 has 128 divisors (see below), whose sum is σ = 283046400. Its totient is φ = 17952768.

The previous prime is 90453079. The next prime is 90453109. The reversal of 90453090 is 9035409.

It is a super-2 number, since 2×90453090² = 16363522981096200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45436 + ... + 47384.

It is an arithmetic number, because the mean of its divisors is an integer number (2211300).

Almost surely, 2^90453090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90453090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141523200).

90453090 is an abundant number, since it is smaller than the sum of its proper divisors (192593310).

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

90453090 is a wasteful number, since it uses less digits than its factorization.

90453090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 90453090 is about 9510.6829407777. The cubic root of 90453090 is about 448.8912456943.

90453090 divided by its sum of digits (30) gives a palindrome (3015103).

Adding to 90453090 its reverse (9035409), we get a palindrome (99488499).

The spelling of 90453090 in words is "ninety million, four hundred fifty-three thousand, ninety".