51389450 has 96 divisors (see below), whose sum is σ = 116242560. Its totient is φ = 16531200.

The previous prime is 51389431. The next prime is 51389483. The reversal of 51389450 is 5498315.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 51389450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 619109 + ... + 619191.

It is an arithmetic number, because the mean of its divisors is an integer number (1210860).

Almost surely, 2^51389450 is an apocalyptic number.

51389450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51389450 is an abundant number, since it is smaller than the sum of its proper divisors (64853110).

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

51389450 is a wasteful number, since it uses less digits than its factorization.

51389450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 51389450 is about 7168.6435258004. The cubic root of 51389450 is about 371.7845372312.

The spelling of 51389450 in words is "fifty-one million, three hundred eighty-nine thousand, four hundred fifty".