90306684 has 96 divisors (see below), whose sum is σ = 254580480. Its totient is φ = 27518400.

The previous prime is 90306679. The next prime is 90306691. The reversal of 90306684 is 48660309.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183679 + ... + 184169.

It is an arithmetic number, because the mean of its divisors is an integer number (2651880).

Almost surely, 2^90306684 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 90306684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127290240).

90306684 is an abundant number, since it is smaller than the sum of its proper divisors (164273796).

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

90306684 is a wasteful number, since it uses less digits than its factorization.

90306684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 90306684 is about 9502.9829001214. The cubic root of 90306684 is about 448.6489253872.

The spelling of 90306684 in words is "ninety million, three hundred six thousand, six hundred eighty-four".