51678388 has 6 divisors (see below), whose sum is σ = 90437186. Its totient is φ = 25839192.

The previous prime is 51678383. The next prime is 51678413. The reversal of 51678388 is 88387615.

It can be written as a sum of positive squares in only one way, i.e., 49028004 + 2650384 = 7002^2 + 1628^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51678383) 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 as a sum of consecutive naturals, namely, 6459795 + ... + 6459802.

Almost surely, 2^51678388 is an apocalyptic number.

It is an amenable number.

51678388 is a deficient number, since it is larger than the sum of its proper divisors (38758798).

51678388 is a wasteful number, since it uses less digits than its factorization.

51678388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12919601 (or 12919599 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 51678388 is about 7188.7681837711. The cubic root of 51678388 is about 372.4800235522.

The spelling of 51678388 in words is "fifty-one million, six hundred seventy-eight thousand, three hundred eighty-eight".