33400564 has 6 divisors (see below), whose sum is σ = 58450994. Its totient is φ = 16700280.

The previous prime is 33400559. The next prime is 33400567. The reversal of 33400564 is 46500433.

It can be written as a sum of positive squares in only one way, i.e., 30338064 + 3062500 = 5508^2 + 1750^2 .

It is a super-2 number, since 2×33400564² = 2231195351036192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33400567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4175067 + ... + 4175074.

Almost surely, 2^33400564 is an apocalyptic number.

It is an amenable number.

33400564 is a deficient number, since it is larger than the sum of its proper divisors (25050430).

33400564 is a wasteful number, since it uses less digits than its factorization.

33400564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8350145 (or 8350143 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 33400564 is about 5779.3221055761. The cubic root of 33400564 is about 322.0460178821.

Adding to 33400564 its reverse (46500433), we get a palindrome (79900997).

The spelling of 33400564 in words is "thirty-three million, four hundred thousand, five hundred sixty-four".