61727988 has 48 divisors (see below), whose sum is σ = 169065344. Its totient is φ = 17159040.

The previous prime is 61727977. The next prime is 61727989. The reversal of 61727988 is 88972716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61727989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6823 + ... + 13038.

Almost surely, 2^61727988 is an apocalyptic number.

It is an amenable number.

61727988 is an abundant number, since it is smaller than the sum of its proper divisors (107337356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61727988 is a wasteful number, since it uses less digits than its factorization.

61727988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19912 (or 19910 counting only the distinct ones).

The product of its digits is 338688, while the sum is 48.

The square root of 61727988 is about 7856.7161078914. The cubic root of 61727988 is about 395.2094984386.

The spelling of 61727988 in words is "sixty-one million, seven hundred twenty-seven thousand, nine hundred eighty-eight".