64923290 has 8 divisors (see below), whose sum is σ = 116861940. Its totient is φ = 25969312.

The previous prime is 64923283. The next prime is 64923293. The reversal of 64923290 is 9232946.

It can be written as a sum of positive squares in 2 ways, for example, as 58507201 + 6416089 = 7649^2 + 2533^2 .

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

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 64923290.

It is not an unprimeable number, because it can be changed into a prime (64923293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3246155 + ... + 3246174.

Almost surely, 2^64923290 is an apocalyptic number.

64923290 is a deficient number, since it is larger than the sum of its proper divisors (51938650).

64923290 is a wasteful number, since it uses less digits than its factorization.

64923290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492336.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 64923290 is about 8057.4989916226. The cubic root of 64923290 is about 401.9143444312.

The spelling of 64923290 in words is "sixty-four million, nine hundred twenty-three thousand, two hundred ninety".