51840068 has 48 divisors (see below), whose sum is σ = 109396224. Its totient is φ = 21014400.

The previous prime is 51840049. The next prime is 51840079. The reversal of 51840068 is 86004815.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64646 + ... + 65442.

It is an arithmetic number, because the mean of its divisors is an integer number (2279088).

Almost surely, 2^51840068 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51840068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54698112).

51840068 is an abundant number, since it is smaller than the sum of its proper divisors (57556156).

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

51840068 is a wasteful number, since it uses less digits than its factorization.

51840068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 51840068 is about 7200.0047222207. The cubic root of 51840068 is about 372.8680637482.

The spelling of 51840068 in words is "fifty-one million, eight hundred forty thousand, sixty-eight".