90687744 has 108 divisors (see below), whose sum is σ = 298881856. Its totient is φ = 25906176.

The previous prime is 90687739. The next prime is 90687749. The reversal of 90687744 is 44778609.

It is an interprime number because it is at equal distance from previous prime (90687739) and next prime (90687749).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 90687744.

It is not an unprimeable number, because it can be changed into a prime (90687749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13317 + ... + 18939.

Almost surely, 2^90687744 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 90687744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149440928).

90687744 is an abundant number, since it is smaller than the sum of its proper divisors (208194112).

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

90687744 is a wasteful number, since it uses less digits than its factorization.

90687744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5652 (or 5635 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 90687744 is about 9523.0112884528. The cubic root of 90687744 is about 449.2790827166.

The spelling of 90687744 in words is "ninety million, six hundred eighty-seven thousand, seven hundred forty-four".