61308980 has 12 divisors (see below), whose sum is σ = 128748900. Its totient is φ = 24523584.

The previous prime is 61308913. The next prime is 61308983. The reversal of 61308980 is 8980316.

It can be written as a sum of positive squares in 2 ways, for example, as 32878756 + 28430224 = 5734^2 + 5332^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61308980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61308983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1532705 + ... + 1532744.

It is an arithmetic number, because the mean of its divisors is an integer number (10729075).

Almost surely, 2^61308980 is an apocalyptic number.

It is an amenable number.

61308980 is an abundant number, since it is smaller than the sum of its proper divisors (67439920).

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

61308980 is a wasteful number, since it uses less digits than its factorization.

61308980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065458 (or 3065456 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 61308980 is about 7830.0051085552. The cubic root of 61308980 is about 394.3132434695.

The spelling of 61308980 in words is "sixty-one million, three hundred eight thousand, nine hundred eighty".