90450432 has 120 divisors (see below), whose sum is σ = 271086816. Its totient is φ = 30108672.

The previous prime is 90450413. The next prime is 90450461. The reversal of 90450432 is 23405409.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 90450396 and 90450405.

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, 124053 + ... + 124779.

Almost surely, 2^90450432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90450432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135543408).

90450432 is an abundant number, since it is smaller than the sum of its proper divisors (180636384).

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

90450432 is an frugal number, since it uses more digits than its factorization.

90450432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 90450432 is about 9510.5432021520. The cubic root of 90450432 is about 448.8868487020.

The spelling of 90450432 in words is "ninety million, four hundred fifty thousand, four hundred thirty-two".