61839860 has 24 divisors (see below), whose sum is σ = 130860576. Its totient is φ = 24546080.

The previous prime is 61839853. The next prime is 61839881. The reversal of 61839860 is 6893816.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9182 + ... + 14421.

It is an arithmetic number, because the mean of its divisors is an integer number (5452524).

Almost surely, 2^61839860 is an apocalyptic number.

It is an amenable number.

61839860 is an abundant number, since it is smaller than the sum of its proper divisors (69020716).

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

61839860 is a wasteful number, since it uses less digits than its factorization.

61839860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23743 (or 23741 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 61839860 is about 7863.8323990278. The cubic root of 61839860 is about 395.4481054613.

The spelling of 61839860 in words is "sixty-one million, eight hundred thirty-nine thousand, eight hundred sixty".