91587942 has 128 divisors (see below), whose sum is σ = 233280000. Its totient is φ = 26459136.

The previous prime is 91587929. The next prime is 91587967. The reversal of 91587942 is 24978519.

It is a super-2 number, since 2×91587942² = 16776702239590728, which contains 22 as substring.

Its product of digits (181440) is a multiple of the sum of its prime divisors (189).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1029034 + ... + 1029122.

It is an arithmetic number, because the mean of its divisors is an integer number (1822500).

Almost surely, 2^91587942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91587942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116640000).

91587942 is an abundant number, since it is smaller than the sum of its proper divisors (141692058).

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

91587942 is a wasteful number, since it uses less digits than its factorization.

91587942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 189 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 91587942 is about 9570.1589328495. The cubic root of 91587942 is about 450.7607576038.

It can be divided in two parts, 91587 and 942, that added together give a palindrome (92529).

The spelling of 91587942 in words is "ninety-one million, five hundred eighty-seven thousand, nine hundred forty-two".