61280872 has 16 divisors (see below), whose sum is σ = 116476740. Its totient is φ = 30220416.

The previous prime is 61280819. The next prime is 61280927. The reversal of 61280872 is 27808216.

It can be written as a sum of positive squares in 2 ways, for example, as 61246276 + 34596 = 7826^2 + 186^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51883 + ... + 53050.

Almost surely, 2^61280872 is an apocalyptic number.

It is an amenable number.

61280872 is a deficient number, since it is larger than the sum of its proper divisors (55195868).

61280872 is a wasteful number, since it uses less digits than its factorization.

61280872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105012 (or 105008 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 61280872 is about 7828.2100125124. The cubic root of 61280872 is about 394.2529746972.

The spelling of 61280872 in words is "sixty-one million, two hundred eighty thousand, eight hundred seventy-two".