58138728 has 16 divisors (see below), whose sum is σ = 145346880. Its totient is φ = 19379568.

The previous prime is 58138723. The next prime is 58138753. The reversal of 58138728 is 82783185.

It is a happy number.

It is a super-3 number, since 3×58138728³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 58138728.

It is not an unprimeable number, because it can be changed into a prime (58138723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211200 + ... + 1211247.

It is an arithmetic number, because the mean of its divisors is an integer number (9084180).

Almost surely, 2^58138728 is an apocalyptic number.

It is an amenable number.

58138728 is an abundant number, since it is smaller than the sum of its proper divisors (87208152).

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

58138728 is a wasteful number, since it uses less digits than its factorization.

58138728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422456 (or 2422452 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 58138728 is about 7624.8756055427. The cubic root of 58138728 is about 387.3960384307.

It can be divided in two parts, 5813 and 8728, that added together give a palindrome (14541).

The spelling of 58138728 in words is "fifty-eight million, one hundred thirty-eight thousand, seven hundred twenty-eight".