51405838 has 8 divisors (see below), whose sum is σ = 84118680. Its totient is φ = 23366280.

The previous prime is 51405791. The next prime is 51405857. The reversal of 51405838 is 83850415.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1168293 + ... + 1168336.

It is an arithmetic number, because the mean of its divisors is an integer number (10514835).

Almost surely, 2^51405838 is an apocalyptic number.

51405838 is a deficient number, since it is larger than the sum of its proper divisors (32712842).

51405838 is a wasteful number, since it uses less digits than its factorization.

51405838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336642.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 51405838 is about 7169.7864682290. The cubic root of 51405838 is about 371.8240534967.

The spelling of 51405838 in words is "fifty-one million, four hundred five thousand, eight hundred thirty-eight".