7978434 has 16 divisors (see below), whose sum is σ = 16219200. Its totient is φ = 2615760.

The previous prime is 7978429. The next prime is 7978441. The reversal of 7978434 is 4348797.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10534 + ... + 11265.

It is an arithmetic number, because the mean of its divisors is an integer number (1013700).

Almost surely, 2^7978434 is an apocalyptic number.

7978434 is an abundant number, since it is smaller than the sum of its proper divisors (8240766).

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

7978434 is a wasteful number, since it uses less digits than its factorization.

7978434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21865.

The product of its digits is 169344, while the sum is 42.

The square root of 7978434 is about 2824.6121857699. The cubic root of 7978434 is about 199.8201216006.

The spelling of 7978434 in words is "seven million, nine hundred seventy-eight thousand, four hundred thirty-four".