64138224 has 40 divisors (see below), whose sum is σ = 174413440. Its totient is φ = 20253888.

The previous prime is 64138219. The next prime is 64138253. The reversal of 64138224 is 42283146.

It is a super-2 number, since 2×64138224² = 8227423555748352, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 64138191 and 64138200.

It is a congruent number.

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, 34252 + ... + 36075.

It is an arithmetic number, because the mean of its divisors is an integer number (4360336).

Almost surely, 2^64138224 is an apocalyptic number.

It is an amenable number.

64138224 is an abundant number, since it is smaller than the sum of its proper divisors (110275216).

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

64138224 is a wasteful number, since it uses less digits than its factorization.

64138224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70357 (or 70351 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 64138224 is about 8008.6343405102. The cubic root of 64138224 is about 400.2877596031.

The spelling of 64138224 in words is "sixty-four million, one hundred thirty-eight thousand, two hundred twenty-four".