90632420 has 48 divisors (see below), whose sum is σ = 201398400. Its totient is φ = 34189056.

The previous prime is 90632419. The next prime is 90632429. The reversal of 90632420 is 2423609.

It is a self number, because there is not a number n which added to its sum of digits gives 90632420.

It is not an unprimeable number, because it can be changed into a prime (90632429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32231 + ... + 34929.

It is an arithmetic number, because the mean of its divisors is an integer number (4195800).

Almost surely, 2^90632420 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 90632420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100699200).

90632420 is an abundant number, since it is smaller than the sum of its proper divisors (110765980).

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

90632420 is a wasteful number, since it uses less digits than its factorization.

90632420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804 (or 2802 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 90632420 is about 9520.1060918458. The cubic root of 90632420 is about 449.1877033268.

The spelling of 90632420 in words is "ninety million, six hundred thirty-two thousand, four hundred twenty".