51644304 has 120 divisors (see below), whose sum is σ = 154365120. Its totient is φ = 16702848.

The previous prime is 51644279. The next prime is 51644311. The reversal of 51644304 is 40344615.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143677 + ... + 144035.

It is an arithmetic number, because the mean of its divisors is an integer number (1286376).

Almost surely, 2^51644304 is an apocalyptic number.

51644304 is a gapful number since it is divisible by the number (54) 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 51644304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77182560).

51644304 is an abundant number, since it is smaller than the sum of its proper divisors (102720816).

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

51644304 is a wasteful number, since it uses less digits than its factorization.

51644304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 401 counting only the distinct ones).

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

The square root of 51644304 is about 7186.3971501720. The cubic root of 51644304 is about 372.3981169647.

Adding to 51644304 its reverse (40344615), we get a palindrome (91988919).

The spelling of 51644304 in words is "fifty-one million, six hundred forty-four thousand, three hundred four".