90545436 has 36 divisors (see below), whose sum is σ = 229748064. Its totient is φ = 30067200.

The previous prime is 90545407. The next prime is 90545449. The reversal of 90545436 is 63454509.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 90545436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5116 + ... + 14396.

Almost surely, 2^90545436 is an apocalyptic number.

It is an amenable number.

90545436 is an abundant number, since it is smaller than the sum of its proper divisors (139202628).

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

90545436 is a wasteful number, since it uses less digits than its factorization.

90545436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9562 (or 9557 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 90545436 is about 9515.5365587023. The cubic root of 90545436 is about 449.0439554655.

The spelling of 90545436 in words is "ninety million, five hundred forty-five thousand, four hundred thirty-six".