61894560 has 288 divisors, whose sum is σ = 243492480. Its totient is φ = 12939264.

The previous prime is 61894549. The next prime is 61894561. The reversal of 61894560 is 6549816.

61894560 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 (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61894561) 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 47 ways as a sum of consecutive naturals, for example, 567786 + ... + 567894.

It is an arithmetic number, because the mean of its divisors is an integer number (845460).

Almost surely, 2^61894560 is an apocalyptic number.

61894560 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 61894560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121746240).

61894560 is an abundant number, since it is smaller than the sum of its proper divisors (181597920).

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

61894560 is a wasteful number, since it uses less digits than its factorization.

61894560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 61894560 is about 7867.3095782485. The cubic root of 61894560 is about 395.5646680185.

The spelling of 61894560 in words is "sixty-one million, eight hundred ninety-four thousand, five hundred sixty".