7881372 has 36 divisors (see below), whose sum is σ = 20202000. Its totient is φ = 2590272.

The previous prime is 7881337. The next prime is 7881373. The reversal of 7881372 is 2731887.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881373) 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, 1129 + ... + 4127.

Almost surely, 2^7881372 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 7881372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10101000).

7881372 is an abundant number, since it is smaller than the sum of its proper divisors (12320628).

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

7881372 is a wasteful number, since it uses less digits than its factorization.

7881372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082 (or 3077 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 7881372 is about 2807.3781362688. The cubic root of 7881372 is about 199.0065063570.

The spelling of 7881372 in words is "seven million, eight hundred eighty-one thousand, three hundred seventy-two".