91849380 has 96 divisors (see below), whose sum is σ = 304093440. Its totient is φ = 20267520.

The previous prime is 91849379. The next prime is 91849399. The reversal of 91849380 is 8394819.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8410 + ... + 15950.

It is an arithmetic number, because the mean of its divisors is an integer number (3167640).

Almost surely, 2^91849380 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 91849380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152046720).

91849380 is an abundant number, since it is smaller than the sum of its proper divisors (212244060).

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

91849380 is a wasteful number, since it uses less digits than its factorization.

91849380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7589 (or 7587 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 91849380 is about 9583.8082201179. The cubic root of 91849380 is about 451.1892493729.

It can be divided in two parts, 91849 and 380, that added together give a palindrome (92229).

The spelling of 91849380 in words is "ninety-one million, eight hundred forty-nine thousand, three hundred eighty".