61984836 has 36 divisors (see below), whose sum is σ = 157575600. Its totient is φ = 20544048.

The previous prime is 61984831. The next prime is 61984891. The reversal of 61984836 is 63848916.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 61984791 and 61984800.

It is not an unprimeable number, because it can be changed into a prime (61984831) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1635 + ... + 11253.

It is an arithmetic number, because the mean of its divisors is an integer number (4377100).

Almost surely, 2^61984836 is an apocalyptic number.

It is an amenable number.

61984836 is an abundant number, since it is smaller than the sum of its proper divisors (95590764).

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

61984836 is a wasteful number, since it uses less digits than its factorization.

61984836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9808 (or 9803 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 61984836 is about 7873.0449001641. The cubic root of 61984836 is about 395.7568908809.

The spelling of 61984836 in words is "sixty-one million, nine hundred eighty-four thousand, eight hundred thirty-six".