61383744 has 84 divisors (see below), whose sum is σ = 182508144. Its totient is φ = 20456064.

The previous prime is 61383733. The next prime is 61383761. The reversal of 61383744 is 44738316.

61383744 is a `hidden beast` number, since 613 + 8 + 37 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 61383699 and 61383708.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13579 + ... + 17525.

It is an arithmetic number, because the mean of its divisors is an integer number (2172716).

Almost surely, 2^61383744 is an apocalyptic number.

61383744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61383744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91254072).

61383744 is an abundant number, since it is smaller than the sum of its proper divisors (121124400).

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

61383744 is an equidigital number, since it uses as much as digits as its factorization.

61383744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974 (or 3952 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 61383744 is about 7834.7778526261. Note that the first 3 decimals coincide. The cubic root of 61383744 is about 394.4734617606.

The spelling of 61383744 in words is "sixty-one million, three hundred eighty-three thousand, seven hundred forty-four".