61616928 has 24 divisors (see below), whose sum is σ = 161744688. Its totient is φ = 20538944.

The previous prime is 61616927. The next prime is 61616939. The reversal of 61616928 is 82961616.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (61616923) 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, 320826 + ... + 321017.

It is an arithmetic number, because the mean of its divisors is an integer number (6739362).

Almost surely, 2^61616928 is an apocalyptic number.

It is an amenable number.

61616928 is an abundant number, since it is smaller than the sum of its proper divisors (100127760).

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

61616928 is a wasteful number, since it uses less digits than its factorization.

61616928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641856 (or 641848 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 61616928 is about 7849.6450875183. The cubic root of 61616928 is about 394.9723379657.

The spelling of 61616928 in words is "sixty-one million, six hundred sixteen thousand, nine hundred twenty-eight".