61947128 has 32 divisors (see below), whose sum is σ = 120441600. Its totient is φ = 29849952.

The previous prime is 61947121. The next prime is 61947169. The reversal of 61947128 is 82174916.

It is a junction number, because it is equal to n+sod(n) for n = 61947091 and 61947100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61947121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23963 + ... + 26421.

It is an arithmetic number, because the mean of its divisors is an integer number (3763800).

Almost surely, 2^61947128 is an apocalyptic number.

It is an amenable number.

61947128 is a deficient number, since it is larger than the sum of its proper divisors (58494472).

61947128 is a wasteful number, since it uses less digits than its factorization.

61947128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579 (or 2575 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 61947128 is about 7870.6497825783. The cubic root of 61947128 is about 395.6766227112.

The spelling of 61947128 in words is "sixty-one million, nine hundred forty-seven thousand, one hundred twenty-eight".