51404620 has 24 divisors (see below), whose sum is σ = 109166400. Its totient is φ = 20330112.

The previous prime is 51404597. The next prime is 51404621. The reversal of 51404620 is 2640415.

It is a junction number, because it is equal to n+sod(n) for n = 51404591 and 51404600.

It is not an unprimeable number, because it can be changed into a prime (51404621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12660 + ... + 16219.

It is an arithmetic number, because the mean of its divisors is an integer number (4548600).

Almost surely, 2^51404620 is an apocalyptic number.

It is an amenable number.

51404620 is an abundant number, since it is smaller than the sum of its proper divisors (57761780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51404620 is a wasteful number, since it uses less digits than its factorization.

51404620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28977 (or 28975 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 51404620 is about 7169.7015279578. The cubic root of 51404620 is about 371.8211168310.

The spelling of 51404620 in words is "fifty-one million, four hundred four thousand, six hundred twenty".