51489048 has 64 divisors (see below), whose sum is σ = 139426560. Its totient is φ = 15751296.

The previous prime is 51489043. The next prime is 51489059. The reversal of 51489048 is 84098415.

It is a super-2 number, since 2×51489048² = 5302244127892608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 51488997 and 51489015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51489041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70461 + ... + 71187.

It is an arithmetic number, because the mean of its divisors is an integer number (2178540).

Almost surely, 2^51489048 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 51489048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69713280).

51489048 is an abundant number, since it is smaller than the sum of its proper divisors (87937512).

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

51489048 is a wasteful number, since it uses less digits than its factorization.

51489048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 51489048 is about 7175.5869446339. The cubic root of 51489048 is about 372.0245676918.

It can be divided in two parts, 5148 and 9048, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 51489048 in words is "fifty-one million, four hundred eighty-nine thousand, forty-eight".