61281008 has 20 divisors (see below), whose sum is σ = 119400840. Its totient is φ = 30467904.

The previous prime is 61281007. The next prime is 61281029. The reversal of 61281008 is 80018216.

61281008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61281001) 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 3 ways as a sum of consecutive naturals, for example, 7835 + ... + 13562.

It is an arithmetic number, because the mean of its divisors is an integer number (5970042).

Almost surely, 2^61281008 is an apocalyptic number.

It is an amenable number.

61281008 is a deficient number, since it is larger than the sum of its proper divisors (58119832).

61281008 is a wasteful number, since it uses less digits than its factorization.

61281008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21584 (or 21578 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 61281008 is about 7828.2186990400. The cubic root of 61281008 is about 394.2532663509.

The spelling of 61281008 in words is "sixty-one million, two hundred eighty-one thousand, eight".