133442978 has 16 divisors (see below), whose sum is σ = 209909880. Its totient is φ = 63536256.

The previous prime is 133442971. The next prime is 133442983. The reversal of 133442978 is 879244331.

It can be written as a sum of positive squares in 4 ways, for example, as 95902849 + 37540129 = 9793^2 + 6127^2 .

It is not an unprimeable number, because it can be changed into a prime (133442971) 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, 11525 + ... + 19992.

Almost surely, 2^133442978 is an apocalyptic number.

133442978 is a deficient number, since it is larger than the sum of its proper divisors (76466902).

133442978 is a wasteful number, since it uses less digits than its factorization.

133442978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31621.

The product of its digits is 145152, while the sum is 41.

The square root of 133442978 is about 11551.7521614688. The cubic root of 133442978 is about 511.0129527981.

The spelling of 133442978 in words is "one hundred thirty-three million, four hundred forty-two thousand, nine hundred seventy-eight".