7872444 has 24 divisors (see below), whose sum is σ = 20410320. Its totient is φ = 2624112.

The previous prime is 7872443. The next prime is 7872521. The reversal of 7872444 is 4442787.

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 = 7872399 and 7872408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7872443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36339 + ... + 36554.

It is an arithmetic number, because the mean of its divisors is an integer number (850430).

Almost surely, 2^7872444 is an apocalyptic number.

It is an amenable number.

7872444 is an abundant number, since it is smaller than the sum of its proper divisors (12537876).

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

7872444 is a wasteful number, since it uses less digits than its factorization.

7872444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72906 (or 72898 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 7872444 is about 2805.7875899647. The cubic root of 7872444 is about 198.9313332609.

The spelling of 7872444 in words is "seven million, eight hundred seventy-two thousand, four hundred forty-four".