61289500 has 24 divisors (see below), whose sum is σ = 133857360. Its totient is φ = 24515600.

The previous prime is 61289483. The next prime is 61289507. The reversal of 61289500 is 598216.

61289500 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 (61289507) 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 7 ways as a sum of consecutive naturals, for example, 60790 + ... + 61789.

It is an arithmetic number, because the mean of its divisors is an integer number (5577390).

Almost surely, 2^61289500 is an apocalyptic number.

It is an amenable number.

61289500 is an abundant number, since it is smaller than the sum of its proper divisors (72567860).

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

61289500 is a wasteful number, since it uses less digits than its factorization.

61289500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122598 (or 122586 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 61289500 is about 7828.7610769521. The cubic root of 61289500 is about 394.2714766916.

The spelling of 61289500 in words is "sixty-one million, two hundred eighty-nine thousand, five hundred".