51629740 has 12 divisors (see below), whose sum is σ = 108422496. Its totient is φ = 20651888.

The previous prime is 51629693. The next prime is 51629741. The reversal of 51629740 is 4792615.

It is a junction number, because it is equal to n+sod(n) for n = 51629696 and 51629705.

It is not an unprimeable number, because it can be changed into a prime (51629741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1290724 + ... + 1290763.

It is an arithmetic number, because the mean of its divisors is an integer number (9035208).

Almost surely, 2^51629740 is an apocalyptic number.

It is an amenable number.

51629740 is an abundant number, since it is smaller than the sum of its proper divisors (56792756).

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

51629740 is a wasteful number, since it uses less digits than its factorization.

51629740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581496 (or 2581494 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 51629740 is about 7185.3837754152. The cubic root of 51629740 is about 372.3631075144.

The spelling of 51629740 in words is "fifty-one million, six hundred twenty-nine thousand, seven hundred forty".