7872615 has 48 divisors (see below), whose sum is σ = 14859936. Its totient is φ = 3840000.

The previous prime is 7872611. The next prime is 7872619. The reversal of 7872615 is 5162787.

It is an interprime number because it is at equal distance from previous prime (7872611) and next prime (7872619).

It is not a de Polignac number, because 7872615 - 2² = 7872611 is a prime.

7872615 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7872615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7872611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31240 + ... + 31490.

It is an arithmetic number, because the mean of its divisors is an integer number (309582).

Almost surely, 2^7872615 is an apocalyptic number.

7872615 is a deficient number, since it is larger than the sum of its proper divisors (6987321).

7872615 is a wasteful number, since it uses less digits than its factorization.

7872615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 317 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 7872615 is about 2805.8180625265. The cubic root of 7872615 is about 198.9327736019.

The spelling of 7872615 in words is "seven million, eight hundred seventy-two thousand, six hundred fifteen".