61839924 has 12 divisors (see below), whose sum is σ = 144293184. Its totient is φ = 20613304.

The previous prime is 61839887. The next prime is 61839929. The reversal of 61839924 is 42993816.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-4 number, since 4×61839924⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61839929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576652 + ... + 2576675.

It is an arithmetic number, because the mean of its divisors is an integer number (12024432).

Almost surely, 2^61839924 is an apocalyptic number.

It is an amenable number.

61839924 is an abundant number, since it is smaller than the sum of its proper divisors (82453260).

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

61839924 is a wasteful number, since it uses less digits than its factorization.

61839924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153334 (or 5153332 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 61839924 is about 7863.8364682895. The cubic root of 61839924 is about 395.4482418818.

The spelling of 61839924 in words is "sixty-one million, eight hundred thirty-nine thousand, nine hundred twenty-four".