91379040 has 96 divisors (see below), whose sum is σ = 290304000. Its totient is φ = 24159744.

The previous prime is 91379039. The next prime is 91379053. The reversal of 91379040 is 4097319.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 91378992 and 91379010.

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, 60211 + ... + 61709.

It is an arithmetic number, because the mean of its divisors is an integer number (3024000).

Almost surely, 2^91379040 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 91379040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145152000).

91379040 is an abundant number, since it is smaller than the sum of its proper divisors (198924960).

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

91379040 is a wasteful number, since it uses less digits than its factorization.

91379040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 91379040 is about 9559.2384633924. The cubic root of 91379040 is about 450.4177848435.

The spelling of 91379040 in words is "ninety-one million, three hundred seventy-nine thousand, forty".