33142440 has 32 divisors (see below), whose sum is σ = 99427680. Its totient is φ = 8837952.

The previous prime is 33142423. The next prime is 33142477. The reversal of 33142440 is 4424133.

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, 137974 + ... + 138213.

It is an arithmetic number, because the mean of its divisors is an integer number (3107115).

Almost surely, 2^33142440 is an apocalyptic number.

33142440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33142440 is an abundant number, since it is smaller than the sum of its proper divisors (66285240).

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

33142440 is a wasteful number, since it uses less digits than its factorization.

33142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276201 (or 276197 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 33142440 is about 5756.9471076257. The cubic root of 33142440 is about 321.2142667437.

Adding to 33142440 its reverse (4424133), we get a palindrome (37566573).

The spelling of 33142440 in words is "thirty-three million, one hundred forty-two thousand, four hundred forty".