7978707 has 24 divisors (see below), whose sum is σ = 12737088. Its totient is φ = 4772400.

The previous prime is 7978699. The next prime is 7978709. The reversal of 7978707 is 7078797.

It is not a de Polignac number, because 7978707 - 2³ = 7978699 is a prime.

7978707 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7978709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7732 + ... + 8702.

It is an arithmetic number, because the mean of its divisors is an integer number (530712).

Almost surely, 2^7978707 is an apocalyptic number.

7978707 is a deficient number, since it is larger than the sum of its proper divisors (4758381).

7978707 is a wasteful number, since it uses less digits than its factorization.

7978707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 172872, while the sum is 45.

The square root of 7978707 is about 2824.6605105747. The cubic root of 7978707 is about 199.8224006724.

The spelling of 7978707 in words is "seven million, nine hundred seventy-eight thousand, seven hundred seven".