91407960 has 256 divisors, whose sum is σ = 354585600. Its totient is φ = 20514816.

The previous prime is 91407959. The next prime is 91407973. The reversal of 91407960 is 6970419.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 808864 + ... + 808976.

It is an arithmetic number, because the mean of its divisors is an integer number (1385100).

Almost surely, 2^91407960 is an apocalyptic number.

91407960 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91407960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177292800).

91407960 is an abundant number, since it is smaller than the sum of its proper divisors (263177640).

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

91407960 is a wasteful number, since it uses less digits than its factorization.

91407960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 91407960 is about 9560.7510165258. The cubic root of 91407960 is about 450.4652964990.

The spelling of 91407960 in words is "ninety-one million, four hundred seven thousand, nine hundred sixty".