61977288 has 32 divisors (see below), whose sum is σ = 155259360. Its totient is φ = 20616960.

The previous prime is 61977287. The next prime is 61977347. The reversal of 61977288 is 88277916.

61977288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61977287) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10768 + ... + 15488.

It is an arithmetic number, because the mean of its divisors is an integer number (4851855).

Almost surely, 2^61977288 is an apocalyptic number.

It is an amenable number.

61977288 is an abundant number, since it is smaller than the sum of its proper divisors (93282072).

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

61977288 is a wasteful number, since it uses less digits than its factorization.

61977288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277 (or 5273 counting only the distinct ones).

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

The square root of 61977288 is about 7872.5655284666. The cubic root of 61977288 is about 395.7408262299.

The spelling of 61977288 in words is "sixty-one million, nine hundred seventy-seven thousand, two hundred eighty-eight".