61128988 has 12 divisors (see below), whose sum is σ = 107269792. Its totient is φ = 30480480.

The previous prime is 61128979. The next prime is 61129001. The reversal of 61128988 is 88982116.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19353 + ... + 22288.

Almost surely, 2^61128988 is an apocalyptic number.

It is an amenable number.

61128988 is a deficient number, since it is larger than the sum of its proper divisors (46140804).

61128988 is a wasteful number, since it uses less digits than its factorization.

61128988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42012 (or 42010 counting only the distinct ones).

The product of its digits is 55296, while the sum is 43.

The square root of 61128988 is about 7818.5029257525. The cubic root of 61128988 is about 393.9269879397.

The spelling of 61128988 in words is "sixty-one million, one hundred twenty-eight thousand, nine hundred eighty-eight".