5178640 has 40 divisors (see below), whose sum is σ = 12677760. Its totient is φ = 1961856.

The previous prime is 5178629. The next prime is 5178647. The reversal of 5178640 is 468715.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (5178647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184 + ... + 3223.

It is an arithmetic number, because the mean of its divisors is an integer number (316944).

Almost surely, 2^5178640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5178640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6338880).

5178640 is an abundant number, since it is smaller than the sum of its proper divisors (7499120).

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

5178640 is a wasteful number, since it uses less digits than its factorization.

5178640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439 (or 3433 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 5178640 is about 2275.6625408878. The cubic root of 5178640 is about 173.0102792738.

The spelling of 5178640 in words is "five million, one hundred seventy-eight thousand, six hundred forty".