61887768 has 16 divisors (see below), whose sum is σ = 154719480. Its totient is φ = 20629248.

The previous prime is 61887751. The next prime is 61887773. The reversal of 61887768 is 86778816.

It is a self number, because there is not a number n which added to its sum of digits gives 61887768.

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, 1289305 + ... + 1289352.

Almost surely, 2^61887768 is an apocalyptic number.

It is an amenable number.

61887768 is an abundant number, since it is smaller than the sum of its proper divisors (92831712).

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

61887768 is a wasteful number, since it uses less digits than its factorization.

61887768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578666 (or 2578662 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 61887768 is about 7866.8779067684. The cubic root of 61887768 is about 395.5501983919.

The spelling of 61887768 in words is "sixty-one million, eight hundred eighty-seven thousand, seven hundred sixty-eight".