7809972 has 24 divisors (see below), whose sum is σ = 19016256. Its totient is φ = 2490048.

The previous prime is 7809947. The next prime is 7809979. The reversal of 7809972 is 2799087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7809979) 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, 13873 + ... + 14424.

It is an arithmetic number, because the mean of its divisors is an integer number (792344).

Almost surely, 2^7809972 is an apocalyptic number.

It is an amenable number.

7809972 is an abundant number, since it is smaller than the sum of its proper divisors (11206284).

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

7809972 is a wasteful number, since it uses less digits than its factorization.

7809972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28327 (or 28325 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 7809972 is about 2794.6327128981. The cubic root of 7809972 is about 198.4037267879.

The spelling of 7809972 in words is "seven million, eight hundred nine thousand, nine hundred seventy-two".