91860060 has 72 divisors (see below), whose sum is σ = 271521936. Its totient is φ = 23201280.

The previous prime is 91860031. The next prime is 91860101. The reversal of 91860060 is 6006819.

It is a super-4 number, since 4×91860060⁴ (a number of 33 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 19540 + ... + 23780.

It is an arithmetic number, because the mean of its divisors is an integer number (3771138).

Almost surely, 2^91860060 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 91860060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135760968).

91860060 is an abundant number, since it is smaller than the sum of its proper divisors (179661876).

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

91860060 is a wasteful number, since it uses less digits than its factorization.

91860060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291 (or 4270 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 91860060 is about 9584.3653937024. The cubic root of 91860060 is about 451.2067363878.

Adding to 91860060 its reverse (6006819), we get a palindrome (97866879).

The spelling of 91860060 in words is "ninety-one million, eight hundred sixty thousand, sixty".