51400389 has 8 divisors (see below), whose sum is σ = 68591520. Its totient is φ = 34238096.

The previous prime is 51400361. The next prime is 51400411. The reversal of 51400389 is 98300415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51400389 - 2⁵ = 51400357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51400309) 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 7 ways as a sum of consecutive naturals, for example, 2634 + ... + 10475.

It is an arithmetic number, because the mean of its divisors is an integer number (8573940).

Almost surely, 2^51400389 is an apocalyptic number.

It is an amenable number.

51400389 is a deficient number, since it is larger than the sum of its proper divisors (17191131).

51400389 is a wasteful number, since it uses less digits than its factorization.

51400389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14419.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 51400389 is about 7169.4064607888. The cubic root of 51400389 is about 371.8109152946.

The spelling of 51400389 in words is "fifty-one million, four hundred thousand, three hundred eighty-nine".