51629690 has 16 divisors (see below), whose sum is σ = 106209792. Its totient is φ = 17701584.

The previous prime is 51629681. The next prime is 51629693. The reversal of 51629690 is 9692615.

It is a super-4 number, since 4×51629690⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (51629693) 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, 368714 + ... + 368853.

It is an arithmetic number, because the mean of its divisors is an integer number (6638112).

Almost surely, 2^51629690 is an apocalyptic number.

51629690 is an abundant number, since it is smaller than the sum of its proper divisors (54580102).

51629690 is a wasteful number, since it uses less digits than its factorization.

51629690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737581.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 51629690 is about 7185.3802961291. The cubic root of 51629690 is about 372.3629873113.

The spelling of 51629690 in words is "fifty-one million, six hundred twenty-nine thousand, six hundred ninety".