64432906 has 8 divisors (see below), whose sum is σ = 96742980. Its totient is φ = 32185248.

The previous prime is 64432903. The next prime is 64432909. The reversal of 64432906 is 60923446.

It is an interprime number because it is at equal distance from previous prime (64432903) and next prime (64432909).

It can be written as a sum of positive squares in 2 ways, for example, as 59985025 + 4447881 = 7745^2 + 2109^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64432903) 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, 12931 + ... + 17206.

Almost surely, 2^64432906 is an apocalyptic number.

64432906 is a deficient number, since it is larger than the sum of its proper divisors (32310074).

64432906 is a wasteful number, since it uses less digits than its factorization.

64432906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31208.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 64432906 is about 8027.0110252821. The cubic root of 64432906 is about 400.8998616047.

The spelling of 64432906 in words is "sixty-four million, four hundred thirty-two thousand, nine hundred six".