51487398 has 12 divisors (see below), whose sum is σ = 111556068. Its totient is φ = 17162460.

The previous prime is 51487393. The next prime is 51487399. The reversal of 51487398 is 89378415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51487391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1430188 + ... + 1430223.

It is an arithmetic number, because the mean of its divisors is an integer number (9296339).

Almost surely, 2^51487398 is an apocalyptic number.

51487398 is an abundant number, since it is smaller than the sum of its proper divisors (60068670).

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

51487398 is a wasteful number, since it uses less digits than its factorization.

51487398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860419 (or 2860416 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 51487398 is about 7175.4719705396. The cubic root of 51487398 is about 372.0205937264.

The spelling of 51487398 in words is "fifty-one million, four hundred eighty-seven thousand, three hundred ninety-eight".