51646928 has 10 divisors (see below), whose sum is σ = 100065954. Its totient is φ = 25823456.

The previous prime is 51646897. The next prime is 51646939. The reversal of 51646928 is 82964615.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30780304 + 20866624 = 5548^2 + 4568^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1613951 + ... + 1613982.

Almost surely, 2^51646928 is an apocalyptic number.

It is an amenable number.

51646928 is a deficient number, since it is larger than the sum of its proper divisors (48419026).

51646928 is a wasteful number, since it uses less digits than its factorization.

51646928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227941 (or 3227935 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 51646928 is about 7186.5797149966. The cubic root of 51646928 is about 372.4044239275.

The spelling of 51646928 in words is "fifty-one million, six hundred forty-six thousand, nine hundred twenty-eight".