91887544 has 96 divisors (see below), whose sum is σ = 212382000. Its totient is φ = 37105152.

The previous prime is 91887527. The next prime is 91887559. The reversal of 91887544 is 44578819.

It is a junction number, because it is equal to n+sod(n) for n = 91887494 and 91887503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 670644 + ... + 670780.

Almost surely, 2^91887544 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 91887544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106191000).

91887544 is an abundant number, since it is smaller than the sum of its proper divisors (120494456).

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

91887544 is a wasteful number, since it uses less digits than its factorization.

91887544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 234 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 91887544 is about 9585.7990798890. The cubic root of 91887544 is about 451.2517313848.

The spelling of 91887544 in words is "ninety-one million, eight hundred eighty-seven thousand, five hundred forty-four".