61518828 has 48 divisors (see below), whose sum is σ = 166844160. Its totient is φ = 17277504.

The previous prime is 61518811. The next prime is 61518829. The reversal of 61518828 is 82881516.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (61518829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1251 + ... + 11162.

It is an arithmetic number, because the mean of its divisors is an integer number (3475920).

Almost surely, 2^61518828 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 61518828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83422080).

61518828 is an abundant number, since it is smaller than the sum of its proper divisors (105325332).

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

61518828 is a wasteful number, since it uses less digits than its factorization.

61518828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12486 (or 12484 counting only the distinct ones).

The product of its digits is 30720, while the sum is 39.

The square root of 61518828 is about 7843.3939082517. The cubic root of 61518828 is about 394.7626154718.

The spelling of 61518828 in words is "sixty-one million, five hundred eighteen thousand, eight hundred twenty-eight".