7878234 has 64 divisors (see below), whose sum is σ = 19869696. Its totient is φ = 2026944.

The previous prime is 7878229. The next prime is 7878239. The reversal of 7878234 is 4328787.

It is an interprime number because it is at equal distance from previous prime (7878229) and next prime (7878239).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7878192 and 7878201.

It is not an unprimeable number, because it can be changed into a prime (7878239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25509 + ... + 25815.

It is an arithmetic number, because the mean of its divisors is an integer number (310464).

Almost surely, 2^7878234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7878234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9934848).

7878234 is an abundant number, since it is smaller than the sum of its proper divisors (11991462).

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

7878234 is a wasteful number, since it uses less digits than its factorization.

7878234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379.

The product of its digits is 75264, while the sum is 39.

The square root of 7878234 is about 2806.8191961721. The cubic root of 7878234 is about 198.9800911036.

The spelling of 7878234 in words is "seven million, eight hundred seventy-eight thousand, two hundred thirty-four".