61069728 has 48 divisors (see below), whose sum is σ = 161602560. Its totient is φ = 20192256.

The previous prime is 61069709. The next prime is 61069739. The reversal of 61069728 is 82796016.

61069728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 9688 + ... + 14696.

It is an arithmetic number, because the mean of its divisors is an integer number (3366720).

Almost surely, 2^61069728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61069728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80801280).

61069728 is an abundant number, since it is smaller than the sum of its proper divisors (100532832).

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

61069728 is a wasteful number, since it uses less digits than its factorization.

61069728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5149 (or 5141 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 61069728 is about 7814.7122787726. The cubic root of 61069728 is about 393.7996524938.

The spelling of 61069728 in words is "sixty-one million, sixty-nine thousand, seven hundred twenty-eight".