7880940 has 36 divisors (see below), whose sum is σ = 23906064. Its totient is φ = 2101536.

The previous prime is 7880909. The next prime is 7880947. The reversal of 7880940 is 490887.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 7880895 and 7880904.

It is not an unprimeable number, because it can be changed into a prime (7880947) 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, 21712 + ... + 22071.

Almost surely, 2^7880940 is an apocalyptic number.

It is an amenable number.

7880940 is an abundant number, since it is smaller than the sum of its proper divisors (16025124).

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

7880940 is a wasteful number, since it uses less digits than its factorization.

7880940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43798 (or 43793 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 7880940 is about 2807.3011950982. The cubic root of 7880940 is about 199.0028702565.

It can be divided in two parts, 78 and 80940, that added together give a palindrome (81018).

The spelling of 7880940 in words is "seven million, eight hundred eighty thousand, nine hundred forty".