3950907871820 has 96 divisors (see below), whose sum is σ = 10231641705600. Its totient is φ = 1247940347904.

The previous prime is 3950907871819. The next prime is 3950907871853. The reversal of 3950907871820 is 281787090593.

It is a super-2 number, since 2×3950907871820² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3950907871820.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1206065 + ... + 3058824.

It is an arithmetic number, because the mean of its divisors is an integer number (106579601100).

Almost surely, 2^{3950907871820} is an apocalyptic number.

It is an amenable number.

3950907871820 is an abundant number, since it is smaller than the sum of its proper divisors (6280733833780).

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

3950907871820 is a wasteful number, since it uses less digits than its factorization.

3950907871820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4265427 (or 4265425 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 59.

The spelling of 3950907871820 in words is "three trillion, nine hundred fifty billion, nine hundred seven million, eight hundred seventy-one thousand, eight hundred twenty".