33301428 has 12 divisors (see below), whose sum is σ = 77703360. Its totient is φ = 11100472.

The previous prime is 33301421. The next prime is 33301441. The reversal of 33301428 is 82410333.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×33301428² = 2217970213678368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33301398 and 33301407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33301421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387548 + ... + 1387571.

It is an arithmetic number, because the mean of its divisors is an integer number (6475280).

Almost surely, 2^33301428 is an apocalyptic number.

It is an amenable number.

33301428 is an abundant number, since it is smaller than the sum of its proper divisors (44401932).

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

33301428 is a wasteful number, since it uses less digits than its factorization.

33301428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775126 (or 2775124 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 33301428 is about 5770.7389474832. The cubic root of 33301428 is about 321.7270812216.

The spelling of 33301428 in words is "thirty-three million, three hundred one thousand, four hundred twenty-eight".