33138480 has 40 divisors (see below), whose sum is σ = 102730032. Its totient is φ = 8836864.

The previous prime is 33138467. The next prime is 33138481. The reversal of 33138480 is 8483133.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (33138481) 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, 68799 + ... + 69278.

Almost surely, 2^33138480 is an apocalyptic number.

33138480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33138480 is an abundant number, since it is smaller than the sum of its proper divisors (69591552).

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

33138480 is a wasteful number, since it uses less digits than its factorization.

33138480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138093 (or 138087 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 33138480 is about 5756.6031650618. The cubic root of 33138480 is about 321.2014728842.

The spelling of 33138480 in words is "thirty-three million, one hundred thirty-eight thousand, four hundred eighty".