33640004 has 6 divisors (see below), whose sum is σ = 58870014. Its totient is φ = 16820000.

The previous prime is 33640003. The next prime is 33640021. The reversal of 33640004 is 40004633.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 33640000 + 4 = 5800^2 + 2^2 .

It is a super-2 number, since 2×33640004² = 2263299738240032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33640003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4204997 + ... + 4205004.

It is an arithmetic number, because the mean of its divisors is an integer number (9811669).

Almost surely, 2^33640004 is an apocalyptic number.

It is an amenable number.

33640004 is a deficient number, since it is larger than the sum of its proper divisors (25230010).

33640004 is a wasteful number, since it uses less digits than its factorization.

33640004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410005 (or 8410003 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 33640004 is about 5800.0003448276. Note that the first 3 decimals coincide. The cubic root of 33640004 is about 322.8137411124.

Adding to 33640004 its reverse (40004633), we get a palindrome (73644637).

The spelling of 33640004 in words is "thirty-three million, six hundred forty thousand, four".