61972228 has 12 divisors (see below), whose sum is σ = 109051852. Its totient is φ = 30814560.

The previous prime is 61972223. The next prime is 61972237. The reversal of 61972228 is 82227916.

61972228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 788544 + 61183684 = 888^2 + 7822^2 .

It is not an unprimeable number, because it can be changed into a prime (61972223) 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, 42075 + ... + 43522.

Almost surely, 2^61972228 is an apocalyptic number.

It is an amenable number.

61972228 is a deficient number, since it is larger than the sum of its proper divisors (47079624).

61972228 is a wasteful number, since it uses less digits than its factorization.

61972228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85782 (or 85780 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 61972228 is about 7872.2441527178. The cubic root of 61972228 is about 395.7300561390.

The spelling of 61972228 in words is "sixty-one million, nine hundred seventy-two thousand, two hundred twenty-eight".