7838478 has 32 divisors (see below), whose sum is σ = 17510400. Its totient is φ = 2599128.

The previous prime is 7838477. The next prime is 7838489. The reversal of 7838478 is 8748387.

It is a super-2 number, since 2×7838478² = 122883474712968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7838477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20275 + ... + 20657.

It is an arithmetic number, because the mean of its divisors is an integer number (547200).

Almost surely, 2^7838478 is an apocalyptic number.

7838478 is an abundant number, since it is smaller than the sum of its proper divisors (9671922).

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

7838478 is a wasteful number, since it uses less digits than its factorization.

7838478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 767 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 7838478 is about 2799.7282010938. The cubic root of 7838478 is about 198.6448215299.

Subtracting 7838478 from its reverse (8748387), we obtain a palindrome (909909).

It can be divided in two parts, 783 and 8478, that added together give a cube (9261 = 21³).

The spelling of 7838478 in words is "seven million, eight hundred thirty-eight thousand, four hundred seventy-eight".