7864420 has 24 divisors (see below), whose sum is σ = 16587648. Its totient is φ = 3132000.

The previous prime is 7864411. The next prime is 7864427. The reversal of 7864420 is 244687.

It is not an unprimeable number, because it can be changed into a prime (7864427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4695 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (691152).

Almost surely, 2^7864420 is an apocalyptic number.

It is an amenable number.

7864420 is an abundant number, since it is smaller than the sum of its proper divisors (8723228).

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

7864420 is a wasteful number, since it uses less digits than its factorization.

7864420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731 (or 1729 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 7864420 is about 2804.3573238801. The cubic root of 7864420 is about 198.8637232682.

The spelling of 7864420 in words is "seven million, eight hundred sixty-four thousand, four hundred twenty".