64433290 has 8 divisors (see below), whose sum is σ = 115979940. Its totient is φ = 25773312.

The previous prime is 64433261. The next prime is 64433321. The reversal of 64433290 is 9233446.

It can be written as a sum of positive squares in 2 ways, for example, as 61168041 + 3265249 = 7821^2 + 1807^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3221655 + ... + 3221674.

Almost surely, 2^64433290 is an apocalyptic number.

64433290 is a deficient number, since it is larger than the sum of its proper divisors (51546650).

64433290 is a wasteful number, since it uses less digits than its factorization.

64433290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6443336.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 64433290 is about 8027.0349444860. The cubic root of 64433290 is about 400.9006580158.

The spelling of 64433290 in words is "sixty-four million, four hundred thirty-three thousand, two hundred ninety".