90691560 has 96 divisors (see below), whose sum is σ = 310284000. Its totient is φ = 22909824.

The previous prime is 90691499. The next prime is 90691577. The reversal of 90691560 is 6519609.

90691560 is a `hidden beast` number, since 9 + 0 + 6 + 91 + 560 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211 + ... + 13469.

It is an arithmetic number, because the mean of its divisors is an integer number (3232125).

Almost surely, 2^90691560 is an apocalyptic number.

90691560 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90691560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155142000).

90691560 is an abundant number, since it is smaller than the sum of its proper divisors (219592440).

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

90691560 is a wasteful number, since it uses less digits than its factorization.

90691560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13295 (or 13288 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 90691560 is about 9523.2116431380. The cubic root of 90691560 is about 449.2853842845.

The spelling of 90691560 in words is "ninety million, six hundred ninety-one thousand, five hundred sixty".