3815812 has 48 divisors (see below), whose sum is σ = 8975232. Its totient is φ = 1370880.

The previous prime is 3815809. The next prime is 3815813. The reversal of 3815812 is 2185183.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (3815813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3528 + ... + 4480.

It is an arithmetic number, because the mean of its divisors is an integer number (186984).

Almost surely, 2^3815812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3815812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4487616).

3815812 is an abundant number, since it is smaller than the sum of its proper divisors (5159420).

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

3815812 is a wasteful number, since it uses less digits than its factorization.

3815812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 986 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 3815812 is about 1953.4103511551. The cubic root of 3815812 is about 156.2652183577.

The spelling of 3815812 in words is "three million, eight hundred fifteen thousand, eight hundred twelve".