61873620 has 96 divisors (see below), whose sum is σ = 182020608. Its totient is φ = 15685632.

The previous prime is 61873619. The next prime is 61873627. The reversal of 61873620 is 2637816.

61873620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61873627) 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 31 ways as a sum of consecutive naturals, for example, 104044 + ... + 104636.

It is an arithmetic number, because the mean of its divisors is an integer number (1896048).

Almost surely, 2^61873620 is an apocalyptic number.

61873620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61873620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91010304).

61873620 is an abundant number, since it is smaller than the sum of its proper divisors (120146988).

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

61873620 is a wasteful number, since it uses less digits than its factorization.

61873620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 61873620 is about 7865.9786422288. The cubic root of 61873620 is about 395.5200541976.

The spelling of 61873620 in words is "sixty-one million, eight hundred seventy-three thousand, six hundred twenty".