90490780 has 12 divisors (see below), whose sum is σ = 190030680. Its totient is φ = 36196304.

The previous prime is 90490747. The next prime is 90490783. The reversal of 90490780 is 8709409.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90490783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2262250 + ... + 2262289.

It is an arithmetic number, because the mean of its divisors is an integer number (15835890).

Almost surely, 2^90490780 is an apocalyptic number.

It is an amenable number.

90490780 is an abundant number, since it is smaller than the sum of its proper divisors (99539900).

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

90490780 is a wasteful number, since it uses less digits than its factorization.

90490780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4524548 (or 4524546 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 90490780 is about 9512.6641904358. The cubic root of 90490780 is about 448.9535850487.

The spelling of 90490780 in words is "ninety million, four hundred ninety thousand, seven hundred eighty".