61308940 has 96 divisors (see below), whose sum is σ = 164602368. Its totient is φ = 18624000.

The previous prime is 61308913. The next prime is 61308983. The reversal of 61308940 is 4980316.

It is a super-3 number, since 3×61308940³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62655 + ... + 63625.

It is an arithmetic number, because the mean of its divisors is an integer number (1714608).

Almost surely, 2^61308940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61308940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82301184).

61308940 is an abundant number, since it is smaller than the sum of its proper divisors (103293428).

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

61308940 is a wasteful number, since it uses less digits than its factorization.

61308940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1037 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 61308940 is about 7830.0025542780. The cubic root of 61308940 is about 394.3131577151.

The spelling of 61308940 in words is "sixty-one million, three hundred eight thousand, nine hundred forty".