51940434 has 64 divisors (see below), whose sum is σ = 128701440. Its totient is φ = 13608000.

The previous prime is 51940387. The next prime is 51940451. The reversal of 51940434 is 43404915.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136857 + ... + 137235.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 2^51940434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51940434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64350720).

51940434 is an abundant number, since it is smaller than the sum of its proper divisors (76761006).

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

51940434 is a wasteful number, since it uses less digits than its factorization.

51940434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 51940434 is about 7206.9712084897. The cubic root of 51940434 is about 373.1085415106.

The spelling of 51940434 in words is "fifty-one million, nine hundred forty thousand, four hundred thirty-four".