7951816 has 8 divisors (see below), whose sum is σ = 14909670. Its totient is φ = 3975904.

The previous prime is 7951807. The next prime is 7951819. The reversal of 7951816 is 6181597.

It can be written as a sum of positive squares in only one way, i.e., 7236100 + 715716 = 2690^2 + 846^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (7951819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496981 + ... + 496996.

Almost surely, 2^7951816 is an apocalyptic number.

It is an amenable number.

7951816 is a deficient number, since it is larger than the sum of its proper divisors (6957854).

7951816 is a wasteful number, since it uses less digits than its factorization.

7951816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993983 (or 993979 counting only the distinct ones).

The product of its digits is 15120, while the sum is 37.

The square root of 7951816 is about 2819.8964519996. The cubic root of 7951816 is about 199.5976578132.

The spelling of 7951816 in words is "seven million, nine hundred fifty-one thousand, eight hundred sixteen".