61887984 has 20 divisors (see below), whose sum is σ = 159877416. Its totient is φ = 20629312.

The previous prime is 61887979. The next prime is 61888031. The reversal of 61887984 is 48978816.

61887984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 644619 + ... + 644714.

Almost surely, 2^61887984 is an apocalyptic number.

It is an amenable number.

61887984 is an abundant number, since it is smaller than the sum of its proper divisors (97989432).

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

61887984 is a wasteful number, since it uses less digits than its factorization.

61887984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289344 (or 1289338 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 61887984 is about 7866.8916352013. The cubic root of 61887984 is about 395.5506585730.

The spelling of 61887984 in words is "sixty-one million, eight hundred eighty-seven thousand, nine hundred eighty-four".