51628885 has 48 divisors (see below), whose sum is σ = 79365888. Its totient is φ = 31553280.

The previous prime is 51628883. The next prime is 51628921. The reversal of 51628885 is 58882615.

It is not a de Polignac number, because 51628885 - 2¹ = 51628883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51628883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 309072 + ... + 309238.

It is an arithmetic number, because the mean of its divisors is an integer number (1653456).

Almost surely, 2^51628885 is an apocalyptic number.

51628885 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51628885 is a deficient number, since it is larger than the sum of its proper divisors (27737003).

51628885 is a wasteful number, since it uses less digits than its factorization.

51628885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 263 counting only the distinct ones).

The product of its digits is 153600, while the sum is 43.

The square root of 51628885 is about 7185.3242793906. The cubic root of 51628885 is about 372.3610520310.

The spelling of 51628885 in words is "fifty-one million, six hundred twenty-eight thousand, eight hundred eighty-five".