7972188 has 24 divisors (see below), whose sum is σ = 21259392. Its totient is φ = 2277744.

The previous prime is 7972183. The next prime is 7972189. The reversal of 7972188 is 8812797.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7972183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47370 + ... + 47537.

It is an arithmetic number, because the mean of its divisors is an integer number (885808).

Almost surely, 2^7972188 is an apocalyptic number.

It is an amenable number.

7972188 is an abundant number, since it is smaller than the sum of its proper divisors (13287204).

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

7972188 is a wasteful number, since it uses less digits than its factorization.

7972188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94921 (or 94919 counting only the distinct ones).

The product of its digits is 56448, while the sum is 42.

The square root of 7972188 is about 2823.5063307880. The cubic root of 7972188 is about 199.7679642345.

The spelling of 7972188 in words is "seven million, nine hundred seventy-two thousand, one hundred eighty-eight".