64223290 has 16 divisors (see below), whose sum is σ = 116902440. Its totient is φ = 25400320.

The previous prime is 64223273. The next prime is 64223303. The reversal of 64223290 is 9232246.

It can be written as a sum of positive squares in 4 ways, for example, as 54420129 + 9803161 = 7377^2 + 3131^2 .

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, 35191 + ... + 36970.

Almost surely, 2^64223290 is an apocalyptic number.

64223290 is a deficient number, since it is larger than the sum of its proper divisors (52679150).

64223290 is a wasteful number, since it uses less digits than its factorization.

64223290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72257.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 64223290 is about 8013.9434737213. The cubic root of 64223290 is about 400.4646475476.

It can be divided in two parts, 642 and 23290, that added together give a palindrome (23932).

The spelling of 64223290 in words is "sixty-four million, two hundred twenty-three thousand, two hundred ninety".