90145100 has 18 divisors (see below), whose sum is σ = 195615084. Its totient is φ = 36058000.

The previous prime is 90145057. The next prime is 90145123. The reversal of 90145100 is 154109.

It is a super-2 number, since 2×90145100² = 16252278108020000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450626 + ... + 450825.

Almost surely, 2^90145100 is an apocalyptic number.

It is an amenable number.

90145100 is an abundant number, since it is smaller than the sum of its proper divisors (105469984).

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

90145100 is a wasteful number, since it uses less digits than its factorization.

90145100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901465 (or 901458 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 90145100 is about 9494.4773421184. The cubic root of 90145100 is about 448.3811793562.

Adding to 90145100 its reverse (154109), we get a palindrome (90299209).

The spelling of 90145100 in words is "ninety million, one hundred forty-five thousand, one hundred".