52581740 has 24 divisors (see below), whose sum is σ = 116234160. Its totient is φ = 19925568.

The previous prime is 52581719. The next prime is 52581743. The reversal of 52581740 is 4718525.

It is a junction number, because it is equal to n+sod(n) for n = 52581697 and 52581706.

It is not an unprimeable number, because it can be changed into a prime (52581743) 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, 68807 + ... + 69566.

It is an arithmetic number, because the mean of its divisors is an integer number (4843090).

Almost surely, 2^52581740 is an apocalyptic number.

It is an amenable number.

52581740 is an abundant number, since it is smaller than the sum of its proper divisors (63652420).

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

52581740 is a wasteful number, since it uses less digits than its factorization.

52581740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138401 (or 138399 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 52581740 is about 7251.3267751495. The cubic root of 52581740 is about 374.6378488886.

The spelling of 52581740 in words is "fifty-two million, five hundred eighty-one thousand, seven hundred forty".