61800940 has 24 divisors (see below), whose sum is σ = 132949152. Its totient is φ = 24117120.

The previous prime is 61800923. The next prime is 61800941. The reversal of 61800940 is 4900816.

It is a junction number, because it is equal to n+sod(n) for n = 61800899 and 61800908.

It is not an unprimeable number, because it can be changed into a prime (61800941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36864 + ... + 38503.

It is an arithmetic number, because the mean of its divisors is an integer number (5539548).

Almost surely, 2^61800940 is an apocalyptic number.

It is an amenable number.

61800940 is an abundant number, since it is smaller than the sum of its proper divisors (71148212).

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

61800940 is a wasteful number, since it uses less digits than its factorization.

61800940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75417 (or 75415 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 61800940 is about 7861.3573891536. The cubic root of 61800940 is about 395.3651273184.

The spelling of 61800940 in words is "sixty-one million, eight hundred thousand, nine hundred forty".