136442398 has 4 divisors (see below), whose sum is σ = 204663600. Its totient is φ = 68221198.

The previous prime is 136442393. The next prime is 136442399. The reversal of 136442398 is 893244631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 136442398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136442393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34110598 + ... + 34110601.

It is an arithmetic number, because the mean of its divisors is an integer number (51165900).

Almost surely, 2^136442398 is an apocalyptic number.

136442398 is a deficient number, since it is larger than the sum of its proper divisors (68221202).

136442398 is an equidigital number, since it uses as much as digits as its factorization.

136442398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68221201.

The product of its digits is 124416, while the sum is 40.

The square root of 136442398 is about 11680.8560473965. The cubic root of 136442398 is about 514.8133272609.

The spelling of 136442398 in words is "one hundred thirty-six million, four hundred forty-two thousand, three hundred ninety-eight".