3892812381 has 12 divisors (see below), whose sum is σ = 5699978908. Its totient is φ = 2559657024.

The previous prime is 3892812379. The next prime is 3892812409. The reversal of 3892812381 is 1832182983.

It is a happy number.

3892812381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3129395481 + 763416900 = 55941^2 + 27630^2 .

It is not a de Polignac number, because 3892812381 - 2¹ = 3892812379 is a prime.

It is a super-2 number, since 2×3892812381² = 30307976467333778322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3892810381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2961910 + ... + 2963223.

Almost surely, 2^3892812381 is an apocalyptic number.

It is an amenable number.

3892812381 is a deficient number, since it is larger than the sum of its proper divisors (1807166527).

3892812381 is a wasteful number, since it uses less digits than its factorization.

3892812381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5925212 (or 5925209 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 3892812381 is about 62392.4064370016. The cubic root of 3892812381 is about 1573.0933347843.

The spelling of 3892812381 in words is "three billion, eight hundred ninety-two million, eight hundred twelve thousand, three hundred eighty-one".