61388036 has 12 divisors (see below), whose sum is σ = 108901212. Its totient is φ = 30273408.

The previous prime is 61388023. The next prime is 61388039. The reversal of 61388036 is 63088316.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45832900 + 15555136 = 6770^2 + 3944^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61387987 and 61388005.

It is not an unprimeable number, because it can be changed into a prime (61388039) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 104825 + ... + 105408.

It is an arithmetic number, because the mean of its divisors is an integer number (9075101).

Almost surely, 2^61388036 is an apocalyptic number.

It is an amenable number.

61388036 is a deficient number, since it is larger than the sum of its proper divisors (47513176).

61388036 is a wasteful number, since it uses less digits than its factorization.

61388036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210310 (or 210308 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 61388036 is about 7835.0517547748. The cubic root of 61388036 is about 394.4826555120.

The spelling of 61388036 in words is "sixty-one million, three hundred eighty-eight thousand, thirty-six".