61800270 has 96 divisors (see below), whose sum is σ = 182759328. Its totient is φ = 13289472.

The previous prime is 61800257. The next prime is 61800301. The reversal of 61800270 is 7200816.

It is a self number, because there is not a number n which added to its sum of digits gives 61800270.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23754 + ... + 26226.

It is an arithmetic number, because the mean of its divisors is an integer number (1903743).

Almost surely, 2^61800270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61800270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91379664).

61800270 is an abundant number, since it is smaller than the sum of its proper divisors (120959058).

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

61800270 is a wasteful number, since it uses less digits than its factorization.

61800270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514 (or 2507 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 61800270 is about 7861.3147755321. The cubic root of 61800270 is about 395.3636985613.

The spelling of 61800270 in words is "sixty-one million, eight hundred thousand, two hundred seventy".