64423898 has 16 divisors (see below), whose sum is σ = 120481344. Its totient is φ = 25100160.

The previous prime is 64423861. The next prime is 64423907. The reversal of 64423898 is 89832446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209015 + ... + 209322.

It is an arithmetic number, because the mean of its divisors is an integer number (7530084).

Almost surely, 2^64423898 is an apocalyptic number.

64423898 is a deficient number, since it is larger than the sum of its proper divisors (56057446).

64423898 is a wasteful number, since it uses less digits than its factorization.

64423898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418357.

The product of its digits is 331776, while the sum is 44.

The square root of 64423898 is about 8026.4499001738. The cubic root of 64423898 is about 400.8811782203.

It can be divided in two parts, 644 and 23898, that added together give a palindrome (24542).

The spelling of 64423898 in words is "sixty-four million, four hundred twenty-three thousand, eight hundred ninety-eight".