33990445 has 4 divisors (see below), whose sum is σ = 40788540. Its totient is φ = 27192352.

The previous prime is 33990443. The next prime is 33990491. The reversal of 33990445 is 54409933.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54409933 = 131 ⋅415343.

It can be written as a sum of positive squares in 2 ways, for example, as 3663396 + 30327049 = 1914^2 + 5507^2 .

It is a cyclic number.

It is not a de Polignac number, because 33990445 - 2¹ = 33990443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33990443) 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, 3399040 + ... + 3399049.

It is an arithmetic number, because the mean of its divisors is an integer number (10197135).

Almost surely, 2^33990445 is an apocalyptic number.

It is an amenable number.

33990445 is a deficient number, since it is larger than the sum of its proper divisors (6798095).

33990445 is an equidigital number, since it uses as much as digits as its factorization.

33990445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6798094.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 33990445 is about 5830.1325027824. The cubic root of 33990445 is about 323.9308297445.

The spelling of 33990445 in words is "thirty-three million, nine hundred ninety thousand, four hundred forty-five".