33220870 has 16 divisors (see below), whose sum is σ = 60328800. Its totient is φ = 13170304.

The previous prime is 33220853. The next prime is 33220879. The reversal of 33220870 is 7802233.

It is a happy number.

It is a super-2 number, since 2×33220870² = 2207252407113800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33220879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13570 + ... + 15829.

It is an arithmetic number, because the mean of its divisors is an integer number (3770550).

Almost surely, 2^33220870 is an apocalyptic number.

33220870 is a deficient number, since it is larger than the sum of its proper divisors (27107930).

33220870 is a wasteful number, since it uses less digits than its factorization.

33220870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29519.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 33220870 is about 5763.7548525245. The cubic root of 33220870 is about 321.4674465385.

The spelling of 33220870 in words is "thirty-three million, two hundred twenty thousand, eight hundred seventy".