3645432 has 64 divisors (see below), whose sum is σ = 11577600. Its totient is φ = 1041120.

The previous prime is 3645419. The next prime is 3645449. The reversal of 3645432 is 2345463.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 3645396 and 3645405.

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, 307 + ... + 2717.

It is an arithmetic number, because the mean of its divisors is an integer number (180900).

Almost surely, 2^3645432 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 3645432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5788800).

3645432 is an abundant number, since it is smaller than the sum of its proper divisors (7932168).

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

3645432 is a wasteful number, since it uses less digits than its factorization.

3645432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433 (or 2423 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 3645432 is about 1909.3014429367. The cubic root of 3645432 is about 153.9039148752.

The spelling of 3645432 in words is "three million, six hundred forty-five thousand, four hundred thirty-two".