90030045 has 64 divisors (see below), whose sum is σ = 180043776. Its totient is φ = 37463040.

The previous prime is 90030029. The next prime is 90030049. The reversal of 90030045 is 54003009.

It is not a de Polignac number, because 90030045 - 2⁴ = 90030029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90030049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54522 + ... + 56148.

It is an arithmetic number, because the mean of its divisors is an integer number (2813184).

Almost surely, 2^90030045 is an apocalyptic number.

It is an amenable number.

90030045 is a deficient number, since it is larger than the sum of its proper divisors (90013731).

90030045 is a wasteful number, since it uses less digits than its factorization.

90030045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 90030045 is about 9488.4163589084. The cubic root of 90030045 is about 448.1903371837.

It can be divided in two parts, 9003004 and 5, that added together give a palindrome (9003009).

The spelling of 90030045 in words is "ninety million, thirty thousand, forty-five".