133143408 has 60 divisors (see below), whose sum is σ = 385477560. Its totient is φ = 42849408.

The previous prime is 133143403. The next prime is 133143421. The reversal of 133143408 is 804341331.

133143408 is a `hidden beast` number, since 1 + 3 + 314 + 340 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133143403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11766 + ... + 20117.

It is an arithmetic number, because the mean of its divisors is an integer number (6424626).

Almost surely, 2^133143408 is an apocalyptic number.

133143408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133143408 is an abundant number, since it is smaller than the sum of its proper divisors (252334152).

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

133143408 is a wasteful number, since it uses less digits than its factorization.

133143408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31926 (or 31917 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 133143408 is about 11538.7784448788. The cubic root of 133143408 is about 510.6302703720.

Adding to 133143408 its reverse (804341331), we get a palindrome (937484739).

The spelling of 133143408 in words is "one hundred thirty-three million, one hundred forty-three thousand, four hundred eight".