3857491136 has 28 divisors (see below), whose sum is σ = 7656685728. Its totient is φ = 1928247552.

The previous prime is 3857491123. The next prime is 3857491139. The reversal of 3857491136 is 6311947583.

It is a happy number.

It is a super-3 number, since 3×3857491136³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (3857491139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459650 + ... + 467966.

Almost surely, 2^3857491136 is an apocalyptic number.

It is an amenable number.

3857491136 is a deficient number, since it is larger than the sum of its proper divisors (3799194592).

3857491136 is an equidigital number, since it uses as much as digits as its factorization.

3857491136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15576 (or 15566 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 3857491136 is about 62108.7041887045. The cubic root of 3857491136 is about 1568.3210764817.

The spelling of 3857491136 in words is "three billion, eight hundred fifty-seven million, four hundred ninety-one thousand, one hundred thirty-six".