64409398 has 4 divisors (see below), whose sum is σ = 96614100. Its totient is φ = 32204698.

The previous prime is 64409381. The next prime is 64409459. The reversal of 64409398 is 89390446.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16102348 + ... + 16102351.

It is an arithmetic number, because the mean of its divisors is an integer number (24153525).

Almost surely, 2^64409398 is an apocalyptic number.

64409398 is a deficient number, since it is larger than the sum of its proper divisors (32204702).

64409398 is a wasteful number, since it uses less digits than its factorization.

64409398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32204701.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 64409398 is about 8025.5465857473. The cubic root of 64409398 is about 400.8511002864.

The spelling of 64409398 in words is "sixty-four million, four hundred nine thousand, three hundred ninety-eight".