91049490 has 96 divisors (see below), whose sum is σ = 276921216. Its totient is φ = 20321280.

The previous prime is 91049461. The next prime is 91049507. The reversal of 91049490 is 9494019.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25410 + ... + 28770.

It is an arithmetic number, because the mean of its divisors is an integer number (2884596).

Almost surely, 2^91049490 is an apocalyptic number.

91049490 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 91049490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138460608).

91049490 is an abundant number, since it is smaller than the sum of its proper divisors (185871726).

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

91049490 is a wasteful number, since it uses less digits than its factorization.

91049490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424 (or 3421 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 91049490 is about 9541.9856424122. The cubic root of 91049490 is about 449.8756693555.

The spelling of 91049490 in words is "ninety-one million, forty-nine thousand, four hundred ninety".