51628072 has 16 divisors (see below), whose sum is σ = 97038900. Its totient is φ = 25751040.

The previous prime is 51628067. The next prime is 51628103. The reversal of 51628072 is 27082615.

It can be written as a sum of positive squares in 2 ways, for example, as 35354916 + 16273156 = 5946^2 + 4034^2 .

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, 4297 + ... + 11032.

Almost surely, 2^51628072 is an apocalyptic number.

It is an amenable number.

51628072 is a deficient number, since it is larger than the sum of its proper divisors (45410828).

51628072 is a wasteful number, since it uses less digits than its factorization.

51628072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15756 (or 15752 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 51628072 is about 7185.2677055208. The cubic root of 51628072 is about 372.3590974977.

Subtracting from 51628072 its sum of digits (31), we obtain a triangular number (51628041 = T₁₀₁₆₁).

The spelling of 51628072 in words is "fifty-one million, six hundred twenty-eight thousand, seventy-two".