7870400 has 42 divisors (see below), whose sum is σ = 19370040. Its totient is φ = 3147520.

The previous prime is 7870399. The next prime is 7870409. The reversal of 7870400 is 40787.

It is a self number, because there is not a number n which added to its sum of digits gives 7870400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7870409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 860 + ... + 4059.

Almost surely, 2^7870400 is an apocalyptic number.

It is an amenable number.

7870400 is an abundant number, since it is smaller than the sum of its proper divisors (11499640).

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

7870400 is a wasteful number, since it uses less digits than its factorization.

7870400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4941 (or 4926 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 7870400 is about 2805.4233192158. The cubic root of 7870400 is about 198.9141149383.

The spelling of 7870400 in words is "seven million, eight hundred seventy thousand, four hundred".