61886880 has 144 divisors (see below), whose sum is σ = 230446944. Its totient is φ = 14999040.

The previous prime is 61886863. The next prime is 61886887. The reversal of 61886880 is 8868816.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×61886880² = 7659971832268800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (61886887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13887 + ... + 17793.

It is an arithmetic number, because the mean of its divisors is an integer number (1600326).

Almost surely, 2^61886880 is an apocalyptic number.

61886880 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 61886880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115223472).

61886880 is an abundant number, since it is smaller than the sum of its proper divisors (168560064).

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

61886880 is a wasteful number, since it uses less digits than its factorization.

61886880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939 (or 3928 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 61886880 is about 7866.8214674035. The cubic root of 61886880 is about 395.5483065250.

The spelling of 61886880 in words is "sixty-one million, eight hundred eighty-six thousand, eight hundred eighty".