47724290 has 16 divisors (see below), whose sum is σ = 85995000. Its totient is φ = 19069440.

The previous prime is 47724289. The next prime is 47724293. The reversal of 47724290 is 9242774.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44102881 + 3621409 = 6641^2 + 1903^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47724290.

It is not an unprimeable number, because it can be changed into a prime (47724293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10580 + ... + 14400.

Almost surely, 2^47724290 is an apocalyptic number.

47724290 is a deficient number, since it is larger than the sum of its proper divisors (38270710).

47724290 is a wasteful number, since it uses less digits than its factorization.

47724290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077.

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

The square root of 47724290 is about 6908.2769197536. The cubic root of 47724290 is about 362.7269510258.

The spelling of 47724290 in words is "forty-seven million, seven hundred twenty-four thousand, two hundred ninety".