7872490 has 16 divisors (see below), whose sum is σ = 14554152. Its totient is φ = 3063744.

The previous prime is 7872443. The next prime is 7872521. The reversal of 7872490 is 942787.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5948721 + 1923769 = 2439^2 + 1387^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10269 + ... + 11008.

Almost surely, 2^7872490 is an apocalyptic number.

7872490 is a deficient number, since it is larger than the sum of its proper divisors (6681662).

7872490 is a wasteful number, since it uses less digits than its factorization.

7872490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21321.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 7872490 is about 2805.7957872946. The cubic root of 7872490 is about 198.9317207231.

The spelling of 7872490 in words is "seven million, eight hundred seventy-two thousand, four hundred ninety".