3812478520 has 64 divisors (see below), whose sum is σ = 8959442400. Its totient is φ = 1458593280.

The previous prime is 3812478511. The next prime is 3812478529. The reversal of 3812478520 is 258742183.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3812478511) and next prime (3812478529).

It is a super-2 number, since 2×3812478520² = 29069984930922780800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3812478529) 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, 65490 + ... + 109150.

Almost surely, 2^3812478520 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 3812478520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4479721200).

3812478520 is an abundant number, since it is smaller than the sum of its proper divisors (5146963880).

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

3812478520 is a wasteful number, since it uses less digits than its factorization.

3812478520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43768 (or 43764 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 3812478520 is about 61745.2712359416. The cubic root of 3812478520 is about 1562.1970085133.

The spelling of 3812478520 in words is "three billion, eight hundred twelve million, four hundred seventy-eight thousand, five hundred twenty".