90820828 has 18 divisors (see below), whose sum is σ = 181742568. Its totient is φ = 38901600.

The previous prime is 90820823. The next prime is 90820831. The reversal of 90820828 is 82802809.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90820823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49528 + ... + 51328.

Almost surely, 2^90820828 is an apocalyptic number.

It is an amenable number.

90820828 is an abundant number, since it is smaller than the sum of its proper divisors (90921740).

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

90820828 is an equidigital number, since it uses as much as digits as its factorization.

90820828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613 (or 1810 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 90820828 is about 9529.9962224547. The cubic root of 90820828 is about 449.4987472141.

It can be divided in two parts, 908 and 20828, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 90820828 in words is "ninety million, eight hundred twenty thousand, eight hundred twenty-eight".