61908900 has 144 divisors (see below), whose sum is σ = 193737600. Its totient is φ = 15206400.

The previous prime is 61908857. The next prime is 61908919. The reversal of 61908900 is 980916.

It is a happy number.

61908900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 311001 + ... + 311199.

It is an arithmetic number, because the mean of its divisors is an integer number (1345400).

Almost surely, 2^61908900 is an apocalyptic number.

61908900 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 61908900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96868800).

61908900 is an abundant number, since it is smaller than the sum of its proper divisors (131828700).

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

61908900 is a wasteful number, since it uses less digits than its factorization.

61908900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 61908900 is about 7868.2208916629. The cubic root of 61908900 is about 395.5952143720.

The spelling of 61908900 in words is "sixty-one million, nine hundred eight thousand, nine hundred".