3813128 has 16 divisors (see below), whose sum is σ = 7799760. Its totient is φ = 1733200.

The previous prime is 3813113. The next prime is 3813143. The reversal of 3813128 is 8213183.

It is an interprime number because it is at equal distance from previous prime (3813113) and next prime (3813143).

It is a junction number, because it is equal to n+sod(n) for n = 3813097 and 3813106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21578 + ... + 21753.

It is an arithmetic number, because the mean of its divisors is an integer number (487485).

Almost surely, 2^3813128 is an apocalyptic number.

It is an amenable number.

3813128 is an abundant number, since it is smaller than the sum of its proper divisors (3986632).

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

3813128 is a wasteful number, since it uses less digits than its factorization.

3813128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43348 (or 43344 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 3813128 is about 1952.7232266760. The cubic root of 3813128 is about 156.2285713547.

The spelling of 3813128 in words is "three million, eight hundred thirteen thousand, one hundred twenty-eight".