7972278 has 16 divisors (see below), whose sum is σ = 16006656. Its totient is φ = 2647080.

The previous prime is 7972277. The next prime is 7972291. The reversal of 7972278 is 8722797.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7972271) 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, 826 + ... + 4077.

It is an arithmetic number, because the mean of its divisors is an integer number (1000416).

Almost surely, 2^7972278 is an apocalyptic number.

7972278 is an abundant number, since it is smaller than the sum of its proper divisors (8034378).

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

7972278 is a wasteful number, since it uses less digits than its factorization.

7972278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5179.

The product of its digits is 98784, while the sum is 42.

The square root of 7972278 is about 2823.5222683733. The cubic root of 7972278 is about 199.7687159749.

It can be divided in two parts, 79722 and 78, that added together give a triangular number (79800 = T₃₉₉).

The spelling of 7972278 in words is "seven million, nine hundred seventy-two thousand, two hundred seventy-eight".