33872142 has 16 divisors (see below), whose sum is σ = 68037840. Its totient is φ = 11241792.

The previous prime is 33872107. The next prime is 33872147. The reversal of 33872142 is 24127833.

It is a super-2 number, since 2×33872142² = 2294644007336328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33872147) 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, 10717 + ... + 13512.

It is an arithmetic number, because the mean of its divisors is an integer number (4252365).

Almost surely, 2^33872142 is an apocalyptic number.

33872142 is an abundant number, since it is smaller than the sum of its proper divisors (34165698).

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

33872142 is a wasteful number, since it uses less digits than its factorization.

33872142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24467.

The product of its digits is 8064, while the sum is 30.

The square root of 33872142 is about 5819.9778350093. The cubic root of 33872142 is about 323.5545815103.

Adding to 33872142 its reverse (24127833), we get a palindrome (57999975).

The spelling of 33872142 in words is "thirty-three million, eight hundred seventy-two thousand, one hundred forty-two".