91490136 has 64 divisors (see below), whose sum is σ = 241056000. Its totient is φ = 28879488.

The previous prime is 91490123. The next prime is 91490171. The reversal of 91490136 is 63109419.

It is a junction number, because it is equal to n+sod(n) for n = 91490097 and 91490106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58290 + ... + 59838.

It is an arithmetic number, because the mean of its divisors is an integer number (3766500).

Almost surely, 2^91490136 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 91490136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120528000).

91490136 is an abundant number, since it is smaller than the sum of its proper divisors (149565864).

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

91490136 is a wasteful number, since it uses less digits than its factorization.

91490136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 91490136 is about 9565.0476214183. The cubic root of 91490136 is about 450.6002459017.

The spelling of 91490136 in words is "ninety-one million, four hundred ninety thousand, one hundred thirty-six".