90545520 has 80 divisors (see below), whose sum is σ = 302293152. Its totient is φ = 22287360.

The previous prime is 90545509. The next prime is 90545551. The reversal of 90545520 is 2554509.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11391 + ... + 17630.

Almost surely, 2^90545520 is an apocalyptic number.

It is an amenable number.

90545520 is an abundant number, since it is smaller than the sum of its proper divisors (211747632).

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

90545520 is a wasteful number, since it uses less digits than its factorization.

90545520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29050 (or 29044 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 90545520 is about 9515.5409725354. The cubic root of 90545520 is about 449.0440943265.

The spelling of 90545520 in words is "ninety million, five hundred forty-five thousand, five hundred twenty".