52781628 has 48 divisors (see below), whose sum is σ = 126433440. Its totient is φ = 17132544.

The previous prime is 52781627. The next prime is 52781633. The reversal of 52781628 is 82618725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52781627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77626 + ... + 78302.

It is an arithmetic number, because the mean of its divisors is an integer number (2634030).

Almost surely, 2^52781628 is an apocalyptic number.

It is an amenable number.

52781628 is an abundant number, since it is smaller than the sum of its proper divisors (73651812).

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

52781628 is a wasteful number, since it uses less digits than its factorization.

52781628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846 (or 844 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 52781628 is about 7265.0965582021. The cubic root of 52781628 is about 375.1119736728. Note that the first 3 decimals are identical.

The spelling of 52781628 in words is "fifty-two million, seven hundred eighty-one thousand, six hundred twenty-eight".