133623464 has 16 divisors (see below), whose sum is σ = 269816820. Its totient is φ = 61672320.

The previous prime is 133623461. The next prime is 133623487. The reversal of 133623464 is 464326331.

It can be written as a sum of positive squares in 2 ways, for example, as 133587364 + 36100 = 11558^2 + 190^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133623464.

It is not an unprimeable number, because it can be changed into a prime (133623461) 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, 642317 + ... + 642524.

Almost surely, 2^133623464 is an apocalyptic number.

It is an amenable number.

133623464 is an abundant number, since it is smaller than the sum of its proper divisors (136193356).

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

133623464 is a wasteful number, since it uses less digits than its factorization.

133623464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284860 (or 1284856 counting only the distinct ones).

The product of its digits is 31104, while the sum is 32.

The square root of 133623464 is about 11559.5615833820. The cubic root of 133623464 is about 511.2432362613.

Adding to 133623464 its reverse (464326331), we get a palindrome (597949795).

The spelling of 133623464 in words is "one hundred thirty-three million, six hundred twenty-three thousand, four hundred sixty-four".