51626430 has 64 divisors (see below), whose sum is σ = 139034880. Its totient is φ = 13630752.

The previous prime is 51626387. The next prime is 51626431. The reversal of 51626430 is 3462615.

51626430 is a `hidden beast` number, since 5 + 1 + 626 + 4 + 30 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 51626394 and 51626403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51626431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27997 + ... + 29783.

It is an arithmetic number, because the mean of its divisors is an integer number (2172420).

Almost surely, 2^51626430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51626430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69517440).

51626430 is an abundant number, since it is smaller than the sum of its proper divisors (87408450).

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

51626430 is a wasteful number, since it uses less digits than its factorization.

51626430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910 (or 1904 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 51626430 is about 7185.1534430379. The cubic root of 51626430 is about 372.3551499029.

The spelling of 51626430 in words is "fifty-one million, six hundred twenty-six thousand, four hundred thirty".