133297830 has 48 divisors (see below), whose sum is σ = 357761664. Its totient is φ = 34398720.

The previous prime is 133297793. The next prime is 133297837. The reversal of 133297830 is 38792331.

It is a happy number.

It is a super-2 number, since 2×133297830² = 35536622965417800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133297837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21099 + ... + 26678.

It is an arithmetic number, because the mean of its divisors is an integer number (7453368).

Almost surely, 2^133297830 is an apocalyptic number.

133297830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133297830 is an abundant number, since it is smaller than the sum of its proper divisors (224463834).

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

133297830 is a wasteful number, since it uses less digits than its factorization.

133297830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47821 (or 47818 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 133297830 is about 11545.4679420108. The cubic root of 133297830 is about 510.8276066717.

The spelling of 133297830 in words is "one hundred thirty-three million, two hundred ninety-seven thousand, eight hundred thirty".