64123998 has 8 divisors (see below), whose sum is σ = 128248008. Its totient is φ = 21374664.

The previous prime is 64123987. The next prime is 64123999. The reversal of 64123998 is 89932146.

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

64123998 is an admirable number.

It is a super-2 number, since 2×64123998² = 8223774239008008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64123999) 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, 5343661 + ... + 5343672.

It is an arithmetic number, because the mean of its divisors is an integer number (16031001).

Almost surely, 2^64123998 is an apocalyptic number.

64123998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64123998 is a wasteful number, since it uses less digits than its factorization.

64123998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10687338.

The product of its digits is 93312, while the sum is 42.

The square root of 64123998 is about 8007.7461248469. The cubic root of 64123998 is about 400.2581625111.

The spelling of 64123998 in words is "sixty-four million, one hundred twenty-three thousand, nine hundred ninety-eight".