2809850956 has 24 divisors (see below), whose sum is σ = 5366088000. Its totient is φ = 1276770000.

The previous prime is 2809850947. The next prime is 2809850971. The reversal of 2809850956 is 6590589082.

It is a super-2 number, since 2×2809850956² = 15790524789868227872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144831 + ... + 163081.

It is an arithmetic number, because the mean of its divisors is an integer number (223587000).

Almost surely, 2^2809850956 is an apocalyptic number.

It is an amenable number.

2809850956 is a deficient number, since it is larger than the sum of its proper divisors (2556237044).

2809850956 is a wasteful number, since it uses less digits than its factorization.

2809850956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21765 (or 21763 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 52.

The square root of 2809850956 is about 53008.0272788943. The cubic root of 2809850956 is about 1411.1107315150.

The spelling of 2809850956 in words is "two billion, eight hundred nine million, eight hundred fifty thousand, nine hundred fifty-six".