61747380 has 96 divisors (see below), whose sum is σ = 198777600. Its totient is φ = 15894144.

The previous prime is 61747379. The next prime is 61747391. The reversal of 61747380 is 8374716.

61747380 is a `hidden beast` number, since 617 + 4 + 7 + 38 + 0 = 666.

61747380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13689 + ... + 17631.

It is an arithmetic number, because the mean of its divisors is an integer number (2070600).

Almost surely, 2^61747380 is an apocalyptic number.

61747380 is a gapful number since it is divisible by the number (60) 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 61747380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99388800).

61747380 is an abundant number, since it is smaller than the sum of its proper divisors (137030220).

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

61747380 is a wasteful number, since it uses less digits than its factorization.

61747380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990 (or 3982 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 61747380 is about 7857.9501143746. The cubic root of 61747380 is about 395.2508794525.

The spelling of 61747380 in words is "sixty-one million, seven hundred forty-seven thousand, three hundred eighty".