7872938 has 24 divisors (see below), whose sum is σ = 12831372. Its totient is φ = 3620864.

The previous prime is 7872937. The next prime is 7872947. The reversal of 7872938 is 8392787.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7856809 + 16129 = 2803^2 + 127^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7872937) 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, 30506 + ... + 30762.

Almost surely, 2^7872938 is an apocalyptic number.

7872938 is a deficient number, since it is larger than the sum of its proper divisors (4958434).

7872938 is a wasteful number, since it uses less digits than its factorization.

7872938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 329 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 7872938 is about 2805.8756209070. The cubic root of 7872938 is about 198.9354941891.

The spelling of 7872938 in words is "seven million, eight hundred seventy-two thousand, nine hundred thirty-eight".