3651582 has 32 divisors (see below), whose sum is σ = 8106624. Its totient is φ = 1087200.

The previous prime is 3651559. The next prime is 3651607. The reversal of 3651582 is 2851563.

It is a super-2 number, since 2×3651582² = 26668102205448, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3573 + ... + 4479.

It is an arithmetic number, because the mean of its divisors is an integer number (253332).

Almost surely, 2^3651582 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3651582, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4053312).

3651582 is an abundant number, since it is smaller than the sum of its proper divisors (4455042).

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

3651582 is a wasteful number, since it uses less digits than its factorization.

3651582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its digits is 7200, while the sum is 30.

The square root of 3651582 is about 1910.9113009242. The cubic root of 3651582 is about 153.9904137508.

The spelling of 3651582 in words is "three million, six hundred fifty-one thousand, five hundred eighty-two".