61984940 has 48 divisors (see below), whose sum is σ = 133358400. Its totient is φ = 24195072.

The previous prime is 61984939. The next prime is 61984943. The reversal of 61984940 is 4948916.

61984940 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 (61984943) 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 15 ways as a sum of consecutive naturals, for example, 172481 + ... + 172839.

It is an arithmetic number, because the mean of its divisors is an integer number (2778300).

Almost surely, 2^61984940 is an apocalyptic number.

It is an amenable number.

61984940 is an abundant number, since it is smaller than the sum of its proper divisors (71373460).

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

61984940 is a wasteful number, since it uses less digits than its factorization.

61984940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 552 counting only the distinct ones).

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

The square root of 61984940 is about 7873.0515049757. The cubic root of 61984940 is about 395.7571122183.

It can be divided in two parts, 6 and 1984940, that multiplied together give a triangular number (11909640 = T₄₈₈₀).

The spelling of 61984940 in words is "sixty-one million, nine hundred eighty-four thousand, nine hundred forty".