64047490 has 16 divisors (see below), whose sum is σ = 124153848. Its totient is φ = 23648256.

The previous prime is 64047469. The next prime is 64047491. The reversal of 64047490 is 9474046.

It can be written as a sum of positive squares in 4 ways, for example, as 20711601 + 43335889 = 4551^2 + 6583^2 .

It is not an unprimeable number, because it can be changed into a prime (64047491) 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, 246207 + ... + 246466.

Almost surely, 2^64047490 is an apocalyptic number.

64047490 is a deficient number, since it is larger than the sum of its proper divisors (60106358).

64047490 is a wasteful number, since it uses less digits than its factorization.

64047490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492693.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 64047490 is about 8002.9675745938. The cubic root of 64047490 is about 400.0989130385.

The spelling of 64047490 in words is "sixty-four million, forty-seven thousand, four hundred ninety".