7866420 has 48 divisors (see below), whose sum is σ = 22545600. Its totient is φ = 2048256.

The previous prime is 7866413. The next prime is 7866431. The reversal of 7866420 is 246687.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1056 + ... + 4104.

It is an arithmetic number, because the mean of its divisors is an integer number (469700).

Almost surely, 2^7866420 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 7866420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11272800).

7866420 is an abundant number, since it is smaller than the sum of its proper divisors (14679180).

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

7866420 is a wasteful number, since it uses less digits than its factorization.

7866420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104 (or 3102 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 7866420 is about 2804.7138891516. The cubic root of 7866420 is about 198.8805795118.

The spelling of 7866420 in words is "seven million, eight hundred sixty-six thousand, four hundred twenty".