133340420 has 24 divisors (see below), whose sum is σ = 286528704. Its totient is φ = 52095456.

The previous prime is 133340351. The next prime is 133340429. The reversal of 133340420 is 24043331.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 133340392 and 133340401.

It is not an unprimeable number, because it can be changed into a prime (133340429) 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, 76664 + ... + 78383.

It is an arithmetic number, because the mean of its divisors is an integer number (11938696).

Almost surely, 2^133340420 is an apocalyptic number.

133340420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133340420 is an abundant number, since it is smaller than the sum of its proper divisors (153188284).

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

133340420 is a wasteful number, since it uses less digits than its factorization.

133340420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155099 (or 155097 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 133340420 is about 11547.3122413833. The cubic root of 133340420 is about 510.8820057345.

Adding to 133340420 its reverse (24043331), we get a palindrome (157383751).

It can be divided in two parts, 13 and 3340420, that added together give a palindrome (3340433).

The spelling of 133340420 in words is "one hundred thirty-three million, three hundred forty thousand, four hundred twenty".