791818240 has 156 divisors (see below), whose sum is σ = 2032285392. Its totient is φ = 295567360.

The previous prime is 791818207. The next prime is 791818243. The reversal of 791818240 is 42818197.

It is a happy number.

It is a super-2 number, since 2×791818240² = 1253952250393395200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 791818193 and 791818202.

It is not an unprimeable number, because it can be changed into a prime (791818243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19312620 + ... + 19312660.

Almost surely, 2^791818240 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 791818240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016142696).

791818240 is an abundant number, since it is smaller than the sum of its proper divisors (1240467152).

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

791818240 is an equidigital number, since it uses as much as digits as its factorization.

791818240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 791818240 is about 28139.2650934597. The cubic root of 791818240 is about 925.1422191845.

The spelling of 791818240 in words is "seven hundred ninety-one million, eight hundred eighteen thousand, two hundred forty".