64133340 has 24 divisors (see below), whose sum is σ = 179573520. Its totient is φ = 17102208.

The previous prime is 64133323. The next prime is 64133351. The reversal of 64133340 is 4333146.

It is a super-2 number, since 2×64133340² = 8226170599111200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64133340.

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, 534385 + ... + 534504.

It is an arithmetic number, because the mean of its divisors is an integer number (7482230).

Almost surely, 2^64133340 is an apocalyptic number.

64133340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64133340 is an abundant number, since it is smaller than the sum of its proper divisors (115440180).

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

64133340 is a wasteful number, since it uses less digits than its factorization.

64133340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068901 (or 1068899 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 64133340 is about 8008.3294138041. The cubic root of 64133340 is about 400.2775989691.

Adding to 64133340 its reverse (4333146), we get a palindrome (68466486).

The spelling of 64133340 in words is "sixty-four million, one hundred thirty-three thousand, three hundred forty".