7978436 has 12 divisors (see below), whose sum is σ = 14303100. Its totient is φ = 3891840.

The previous prime is 7978429. The next prime is 7978441. The reversal of 7978436 is 6348797.

It can be written as a sum of positive squares in 2 ways, for example, as 1577536 + 6400900 = 1256^2 + 2530^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24161 + ... + 24488.

It is an arithmetic number, because the mean of its divisors is an integer number (1191925).

Almost surely, 2^7978436 is an apocalyptic number.

It is an amenable number.

7978436 is a deficient number, since it is larger than the sum of its proper divisors (6324664).

7978436 is a wasteful number, since it uses less digits than its factorization.

7978436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48694 (or 48692 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The square root of 7978436 is about 2824.6125398008. The cubic root of 7978436 is about 199.8201382973.

The spelling of 7978436 in words is "seven million, nine hundred seventy-eight thousand, four hundred thirty-six".