61388082 has 96 divisors (see below), whose sum is σ = 158620800. Its totient is φ = 17146080.

The previous prime is 61388057. The next prime is 61388083. The reversal of 61388082 is 28088316.

61388082 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61388082² = 7536993223277448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61388083) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 376533 + ... + 376695.

It is an arithmetic number, because the mean of its divisors is an integer number (1652300).

Almost surely, 2^61388082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61388082, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79310400).

61388082 is an abundant number, since it is smaller than the sum of its proper divisors (97232718).

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

61388082 is a wasteful number, since it uses less digits than its factorization.

61388082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 61388082 is about 7835.0546903005. The cubic root of 61388082 is about 394.4827540447.

The spelling of 61388082 in words is "sixty-one million, three hundred eighty-eight thousand, eighty-two".