61812384 has 24 divisors (see below), whose sum is σ = 162257760. Its totient is φ = 20604096.

The previous prime is 61812383. The next prime is 61812397. The reversal of 61812384 is 48321816.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (61812383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321844 + ... + 322035.

It is an arithmetic number, because the mean of its divisors is an integer number (6760740).

Almost surely, 2^61812384 is an apocalyptic number.

It is an amenable number.

61812384 is an abundant number, since it is smaller than the sum of its proper divisors (100445376).

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

61812384 is a wasteful number, since it uses less digits than its factorization.

61812384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643892 (or 643884 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 61812384 is about 7862.0852195839. The cubic root of 61812384 is about 395.3895297480.

The spelling of 61812384 in words is "sixty-one million, eight hundred twelve thousand, three hundred eighty-four".