51940460 has 108 divisors (see below), whose sum is σ = 130846464. Its totient is φ = 17297280.

The previous prime is 51940451. The next prime is 51940501. The reversal of 51940460 is 6404915.

It is a super-2 number, since 2×51940460² = 5395622770023200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 408917 + ... + 409043.

Almost surely, 2^51940460 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 51940460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65423232).

51940460 is an abundant number, since it is smaller than the sum of its proper divisors (78906004).

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

51940460 is a wasteful number, since it uses less digits than its factorization.

51940460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 51940460 is about 7206.9730122986. The cubic root of 51940460 is about 373.1086037667.

The spelling of 51940460 in words is "fifty-one million, nine hundred forty thousand, four hundred sixty".