7857996 has 48 divisors (see below), whose sum is σ = 19450368. Its totient is φ = 2464000.

The previous prime is 7857989. The next prime is 7858003. The reversal of 7857996 is 6997587.

It is an interprime number because it is at equal distance from previous prime (7857989) and next prime (7858003).

It is a super-2 number, since 2×7857996² = 123496202272032, which contains 22 as substring.

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, 19396 + ... + 19796.

It is an arithmetic number, because the mean of its divisors is an integer number (405216).

Almost surely, 2^7857996 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 7857996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9725184).

7857996 is an abundant number, since it is smaller than the sum of its proper divisors (11592372).

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

7857996 is a wasteful number, since it uses less digits than its factorization.

7857996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its digits is 952560, while the sum is 51.

The square root of 7857996 is about 2803.2117294275. The cubic root of 7857996 is about 198.8095616748.

The spelling of 7857996 in words is "seven million, eight hundred fifty-seven thousand, nine hundred ninety-six".