61820984 has 16 divisors (see below), whose sum is σ = 122015400. Its totient is φ = 29283552.

The previous prime is 61820981. The next prime is 61821059. The reversal of 61820984 is 48902816.

61820984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61820981) 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 3 ways as a sum of consecutive naturals, for example, 203207 + ... + 203510.

Almost surely, 2^61820984 is an apocalyptic number.

It is an amenable number.

61820984 is a deficient number, since it is larger than the sum of its proper divisors (60194416).

61820984 is a wasteful number, since it uses less digits than its factorization.

61820984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406742 (or 406738 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 61820984 is about 7862.6321292554. The cubic root of 61820984 is about 395.4078658378.

The spelling of 61820984 in words is "sixty-one million, eight hundred twenty thousand, nine hundred eighty-four".