64402006 has 4 divisors (see below), whose sum is σ = 96603012. Its totient is φ = 32201002.

The previous prime is 64401991. The next prime is 64402007. The reversal of 64402006 is 60020446.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64402007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16100500 + ... + 16100503.

It is an arithmetic number, because the mean of its divisors is an integer number (24150753).

Almost surely, 2^64402006 is an apocalyptic number.

64402006 is a deficient number, since it is larger than the sum of its proper divisors (32201006).

64402006 is a wasteful number, since it uses less digits than its factorization.

64402006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32201005.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 64402006 is about 8025.0860431524. The cubic root of 64402006 is about 400.8357650258.

The spelling of 64402006 in words is "sixty-four million, four hundred two thousand, six".