33053640 has 32 divisors (see below), whose sum is σ = 99161280. Its totient is φ = 8814272.

The previous prime is 33053611. The next prime is 33053651. The reversal of 33053640 is 4635033.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 33053640.

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, 137604 + ... + 137843.

It is an arithmetic number, because the mean of its divisors is an integer number (3098790).

Almost surely, 2^33053640 is an apocalyptic number.

33053640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33053640 is an abundant number, since it is smaller than the sum of its proper divisors (66107640).

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

33053640 is a wasteful number, since it uses less digits than its factorization.

33053640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275461 (or 275457 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 33053640 is about 5749.2295135957. The cubic root of 33053640 is about 320.9271289638.

Adding to 33053640 its reverse (4635033), we get a palindrome (37688673).

The spelling of 33053640 in words is "thirty-three million, fifty-three thousand, six hundred forty".