3891251250 has 60 divisors (see below), whose sum is σ = 10535463510. Its totient is φ = 1037664000.

The previous prime is 3891251237. The next prime is 3891251303. The reversal of 3891251250 is 521521983.

3891251250 is a `hidden beast` number, since 3 + 8 + 91 + 2 + 512 + 50 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 34468641 + 3856782609 = 5871^2 + 62103^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 161695 + ... + 184194.

Almost surely, 2^3891251250 is an apocalyptic number.

3891251250 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3891251250 is an abundant number, since it is smaller than the sum of its proper divisors (6644212260).

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

3891251250 is a wasteful number, since it uses less digits than its factorization.

3891251250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345917 (or 345899 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 3891251250 is about 62379.8945975384. The cubic root of 3891251250 is about 1572.8830212725.

The spelling of 3891251250 in words is "three billion, eight hundred ninety-one million, two hundred fifty-one thousand, two hundred fifty".