47780306 has 16 divisors (see below), whose sum is σ = 82947840. Its totient is φ = 20217600.

The previous prime is 47780297. The next prime is 47780323. The reversal of 47780306 is 60308774.

It is a super-6 number, since 6×47780306⁶ (a number of 47 digits) contains 666666 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20495 + ... + 22706.

It is an arithmetic number, because the mean of its divisors is an integer number (5184240).

Almost surely, 2^47780306 is an apocalyptic number.

47780306 is a deficient number, since it is larger than the sum of its proper divisors (35167534).

47780306 is a wasteful number, since it uses less digits than its factorization.

47780306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43289.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 47780306 is about 6912.3299979095. The cubic root of 47780306 is about 362.8688114810.

The spelling of 47780306 in words is "forty-seven million, seven hundred eighty thousand, three hundred six".