82591040 has 56 divisors (see below), whose sum is σ = 224771712. Its totient is φ = 28316160.

The previous prime is 82591031. The next prime is 82591051. The reversal of 82591040 is 4019528.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 82590994 and 82591012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16196 + ... + 20675.

Almost surely, 2^82591040 is an apocalyptic number.

82591040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82591040 is an abundant number, since it is smaller than the sum of its proper divisors (142180672).

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

82591040 is a wasteful number, since it uses less digits than its factorization.

82591040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36895 (or 36885 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 82591040 is about 9087.9612675231. The cubic root of 82591040 is about 435.4894565497.

The spelling of 82591040 in words is "eighty-two million, five hundred ninety-one thousand, forty".