4351644 has 108 divisors (see below), whose sum is σ = 12877592. Its totient is φ = 1283040.

The previous prime is 4351637. The next prime is 4351649. The reversal of 4351644 is 4461534.

It is a tau number, because it is divible by the number of its divisors (108).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4351649) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 117594 + ... + 117630.

Almost surely, 2^4351644 is an apocalyptic number.

4351644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4351644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6438796).

4351644 is an abundant number, since it is smaller than the sum of its proper divisors (8525948).

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

4351644 is a wasteful number, since it uses less digits than its factorization.

4351644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 53 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 4351644 is about 2086.0594430648. The cubic root of 4351644 is about 163.2617521501.

The spelling of 4351644 in words is "four million, three hundred fifty-one thousand, six hundred forty-four".