133865390 has 8 divisors (see below), whose sum is σ = 240957720. Its totient is φ = 53546152.

The previous prime is 133865387. The next prime is 133865399. The reversal of 133865390 is 93568331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133865399) 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, 6693260 + ... + 6693279.

It is an arithmetic number, because the mean of its divisors is an integer number (30119715).

Almost surely, 2^133865390 is an apocalyptic number.

133865390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133865390 is a deficient number, since it is larger than the sum of its proper divisors (107092330).

133865390 is a wasteful number, since it uses less digits than its factorization.

133865390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13386546.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 133865390 is about 11570.0211754344. The cubic root of 133865390 is about 511.5515864556.

The spelling of 133865390 in words is "one hundred thirty-three million, eight hundred sixty-five thousand, three hundred ninety".