61478730 has 32 divisors (see below), whose sum is σ = 163944000. Its totient is φ = 16394256.

The previous prime is 61478723. The next prime is 61478759. The reversal of 61478730 is 3787416.

61478730 is a `hidden beast` number, since 614 + 7 + 8 + 7 + 30 = 666.

61478730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 113580 + ... + 114119.

It is an arithmetic number, because the mean of its divisors is an integer number (5123250).

Almost surely, 2^61478730 is an apocalyptic number.

61478730 is an abundant number, since it is smaller than the sum of its proper divisors (102465270).

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

61478730 is a wasteful number, since it uses less digits than its factorization.

61478730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227715 (or 227709 counting only the distinct ones).

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

The square root of 61478730 is about 7840.8373277348. The cubic root of 61478730 is about 394.6768280130.

The spelling of 61478730 in words is "sixty-one million, four hundred seventy-eight thousand, seven hundred thirty".