7870866 has 16 divisors (see below), whose sum is σ = 15796704. Its totient is φ = 2614464.

The previous prime is 7870823. The next prime is 7870867. The reversal of 7870866 is 6680787.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7870867) 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, 295 + ... + 3978.

It is an arithmetic number, because the mean of its divisors is an integer number (987294).

Almost surely, 2^7870866 is an apocalyptic number.

7870866 is an abundant number, since it is smaller than the sum of its proper divisors (7925838).

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

7870866 is a wasteful number, since it uses less digits than its factorization.

7870866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 7870866 is about 2805.5063714061. The cubic root of 7870866 is about 198.9180407086.

The spelling of 7870866 in words is "seven million, eight hundred seventy thousand, eight hundred sixty-six".