7791940 has 48 divisors (see below), whose sum is σ = 18402048. Its totient is φ = 2749824.

The previous prime is 7791929. The next prime is 7791961. The reversal of 7791940 is 491977.

It is a nialpdrome in base 11.

It is a zygodrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 7791940.

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, 5329 + ... + 6631.

It is an arithmetic number, because the mean of its divisors is an integer number (383376).

Almost surely, 2^7791940 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 7791940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9201024).

7791940 is an abundant number, since it is smaller than the sum of its proper divisors (10610108).

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

7791940 is a wasteful number, since it uses less digits than its factorization.

7791940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 7791940 is about 2791.4046643222. The cubic root of 7791940 is about 198.2509147623.

Adding to 7791940 its sum of digits (37), we get a palindrome (7791977).

The spelling of 7791940 in words is "seven million, seven hundred ninety-one thousand, nine hundred forty".