51028407 has 32 divisors (see below), whose sum is σ = 80870400. Its totient is φ = 31688064.

The previous prime is 51028403. The next prime is 51028409. The reversal of 51028407 is 70482015.

51028407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51028407 - 2² = 51028403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51028403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48594 + ... + 49632.

It is an arithmetic number, because the mean of its divisors is an integer number (2527200).

Almost surely, 2^51028407 is an apocalyptic number.

51028407 is a deficient number, since it is larger than the sum of its proper divisors (29841993).

51028407 is a wasteful number, since it uses less digits than its factorization.

51028407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 51028407 is about 7143.4170394847. The cubic root of 51028407 is about 370.9118173262.

The spelling of 51028407 in words is "fifty-one million, twenty-eight thousand, four hundred seven".