3817872 has 30 divisors (see below), whose sum is σ = 10685142. Its totient is φ = 1272576.

The previous prime is 3817859. The next prime is 3817889. The reversal of 3817872 is 2787183.

It can be written as a sum of positive squares in only one way, i.e., 2702736 + 1115136 = 1644^2 + 1056^2 .

It is a super-2 number, since 2×3817872² = 29152293216768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13113 + ... + 13400.

Almost surely, 2^3817872 is an apocalyptic number.

It is an amenable number.

3817872 is an abundant number, since it is smaller than the sum of its proper divisors (6867270).

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

3817872 is a wasteful number, since it uses less digits than its factorization.

3817872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26527 (or 26518 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 3817872 is about 1953.9375629738. The cubic root of 3817872 is about 156.2933336876.

The spelling of 3817872 in words is "three million, eight hundred seventeen thousand, eight hundred seventy-two".