61649228 has 6 divisors (see below), whose sum is σ = 107886156. Its totient is φ = 30824612.

The previous prime is 61649213. The next prime is 61649233. The reversal of 61649228 is 82294616.

61649228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61649191 and 61649200.

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 as a sum of consecutive naturals, namely, 7706150 + ... + 7706157.

It is an arithmetic number, because the mean of its divisors is an integer number (17981026).

Almost surely, 2^61649228 is an apocalyptic number.

It is an amenable number.

61649228 is a deficient number, since it is larger than the sum of its proper divisors (46236928).

61649228 is a wasteful number, since it uses less digits than its factorization.

61649228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15412311 (or 15412309 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 61649228 is about 7851.7022358212. The cubic root of 61649228 is about 395.0413416111.

The spelling of 61649228 in words is "sixty-one million, six hundred forty-nine thousand, two hundred twenty-eight".