33420540 has 48 divisors (see below), whose sum is σ = 93830688. Its totient is φ = 8888064.

The previous prime is 33420523. The next prime is 33420547. The reversal of 33420540 is 4502433.

It is a happy number.

It is a super-2 number, since 2×33420540² = 2233864987783200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33420547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38754 + ... + 39606.

It is an arithmetic number, because the mean of its divisors is an integer number (1954806).

Almost surely, 2^33420540 is an apocalyptic number.

33420540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33420540 is an abundant number, since it is smaller than the sum of its proper divisors (60410148).

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

33420540 is a wasteful number, since it uses less digits than its factorization.

33420540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1516 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 33420540 is about 5781.0500776243. The cubic root of 33420540 is about 322.1102075085.

Adding to 33420540 its reverse (4502433), we get a palindrome (37922973).

The spelling of 33420540 in words is "thirty-three million, four hundred twenty thousand, five hundred forty".