61138028 has 12 divisors (see below), whose sum is σ = 122276112. Its totient is φ = 26202000.

The previous prime is 61137997. The next prime is 61138039. The reversal of 61138028 is 82083116.

61138028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

61138028 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1091723 + ... + 1091778.

It is an arithmetic number, because the mean of its divisors is an integer number (10189676).

Almost surely, 2^61138028 is an apocalyptic number.

It is an amenable number.

61138028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61138028 is a wasteful number, since it uses less digits than its factorization.

61138028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183512 (or 2183510 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 61138028 is about 7819.0810201711. The cubic root of 61138028 is about 393.9464054837.

It can be divided in two parts, 6113 and 8028, that added together give a palindrome (14141).

The spelling of 61138028 in words is "sixty-one million, one hundred thirty-eight thousand, twenty-eight".