61868484 has 72 divisors (see below), whose sum is σ = 170352000. Its totient is φ = 18857664.

The previous prime is 61868479. The next prime is 61868489. The reversal of 61868484 is 48486816.

It is an interprime number because it is at equal distance from previous prime (61868479) and next prime (61868489).

It is a Smith number, since the sum of its digits (45) 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 (61868489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18277 + ... + 21395.

It is an arithmetic number, because the mean of its divisors is an integer number (2366000).

Almost surely, 2^61868484 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 61868484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85176000).

61868484 is an abundant number, since it is smaller than the sum of its proper divisors (108483516).

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

61868484 is a wasteful number, since it uses less digits than its factorization.

61868484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177 (or 3172 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 61868484 is about 7865.6521662225. The cubic root of 61868484 is about 395.5091101302.

The spelling of 61868484 in words is "sixty-one million, eight hundred sixty-eight thousand, four hundred eighty-four".