133642998 has 96 divisors (see below), whose sum is σ = 317921760. Its totient is φ = 40435200.

The previous prime is 133642997. The next prime is 133643021. The reversal of 133642998 is 899246331.

It is a happy number.

133642998 is a `hidden beast` number, since 133 + 6 + 429 + 98 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133642997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1323148 + ... + 1323248.

It is an arithmetic number, because the mean of its divisors is an integer number (3311685).

Almost surely, 2^133642998 is an apocalyptic number.

133642998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133642998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158960880).

133642998 is an abundant number, since it is smaller than the sum of its proper divisors (184278762).

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

133642998 is a wasteful number, since it uses less digits than its factorization.

133642998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 251 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 133642998 is about 11560.4064807428. The cubic root of 133642998 is about 511.2681474021.

The spelling of 133642998 in words is "one hundred thirty-three million, six hundred forty-two thousand, nine hundred ninety-eight".