90684756 has 18 divisors (see below), whose sum is σ = 229231002. Its totient is φ = 30228240.

The previous prime is 90684751. The next prime is 90684779. The reversal of 90684756 is 65748609.

It can be written as a sum of positive squares in only one way, i.e., 78322500 + 12362256 = 8850^2 + 3516^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90684751) 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, 1259475 + ... + 1259546.

Almost surely, 2^90684756 is an apocalyptic number.

It is an amenable number.

90684756 is an abundant number, since it is smaller than the sum of its proper divisors (138546246).

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

90684756 is a wasteful number, since it uses less digits than its factorization.

90684756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519031 (or 2519026 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 90684756 is about 9522.8544040114. The cubic root of 90684756 is about 449.2741483466.

It can be divided in two parts, 9068 and 4756, that added together give a cube (13824 = 24³).

The spelling of 90684756 in words is "ninety million, six hundred eighty-four thousand, seven hundred fifty-six".