64238906 has 4 divisors (see below), whose sum is σ = 96358362. Its totient is φ = 32119452.

The previous prime is 64238893. The next prime is 64238921. The reversal of 64238906 is 60983246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45010681 + 19228225 = 6709^2 + 4385^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64238906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16059725 + ... + 16059728.

Almost surely, 2^64238906 is an apocalyptic number.

64238906 is a deficient number, since it is larger than the sum of its proper divisors (32119456).

64238906 is a wasteful number, since it uses less digits than its factorization.

64238906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32119455.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 64238906 is about 8014.9177163587. The cubic root of 64238906 is about 400.4971027994.

The spelling of 64238906 in words is "sixty-four million, two hundred thirty-eight thousand, nine hundred six".