51944004 has 120 divisors (see below), whose sum is σ = 159642560. Its totient is φ = 14416704.

The previous prime is 51943999. The next prime is 51944023. The reversal of 51944004 is 40044915.

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 39 ways as a sum of consecutive naturals, for example, 83607 + ... + 84225.

Almost surely, 2^51944004 is an apocalyptic number.

51944004 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 51944004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79821280).

51944004 is an abundant number, since it is smaller than the sum of its proper divisors (107698556).

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

51944004 is a wasteful number, since it uses less digits than its factorization.

51944004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 51944004 is about 7207.2188810941. The cubic root of 51944004 is about 373.1170895523.

Adding to 51944004 its reverse (40044915), we get a palindrome (91988919).

The spelling of 51944004 in words is "fifty-one million, nine hundred forty-four thousand, four".