3591972 has 48 divisors (see below), whose sum is σ = 9452800. Its totient is φ = 1179360.

The previous prime is 3591967. The next prime is 3591977. The reversal of 3591972 is 2791953.

It is an interprime number because it is at equal distance from previous prime (3591967) and next prime (3591977).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (3591977) 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, 8322 + ... + 8742.

Almost surely, 2^3591972 is an apocalyptic number.

3591972 is the 948-th decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3591972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4726400).

3591972 is an abundant number, since it is smaller than the sum of its proper divisors (5860828).

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

3591972 is a wasteful number, since it uses less digits than its factorization.

3591972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 505 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 3591972 is about 1895.2498516027. The cubic root of 3591972 is about 153.1478770207.

The spelling of 3591972 in words is "three million, five hundred ninety-one thousand, nine hundred seventy-two".