33640461 has 8 divisors (see below), whose sum is σ = 49837760. Its totient is φ = 22426956.

The previous prime is 33640457. The next prime is 33640483. The reversal of 33640461 is 16404633.

It is not a de Polignac number, because 33640461 - 2² = 33640457 is a prime.

It is a super-2 number, since 2×33640461² = 2263361232585042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1245943 = 33640461 / (3 + 3 + 6 + 4 + 0 + 4 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33640441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622945 + ... + 622998.

It is an arithmetic number, because the mean of its divisors is an integer number (6229720).

Almost surely, 2^33640461 is an apocalyptic number.

It is an amenable number.

33640461 is a deficient number, since it is larger than the sum of its proper divisors (16197299).

33640461 is a wasteful number, since it uses less digits than its factorization.

33640461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245952 (or 1245946 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 33640461 is about 5800.0397412432. The cubic root of 33640461 is about 322.8152029158.

It can be divided in two parts, 3 and 3640461, that added together give a square (3640464 = 1908²).

The spelling of 33640461 in words is "thirty-three million, six hundred forty thousand, four hundred sixty-one".