133767438 has 32 divisors (see below), whose sum is σ = 306996480. Its totient is φ = 38064000.

The previous prime is 133767437. The next prime is 133767493. The reversal of 133767438 is 834767331.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 133767438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133767437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4198 + ... + 16886.

It is an arithmetic number, because the mean of its divisors is an integer number (9593640).

Almost surely, 2^133767438 is an apocalyptic number.

133767438 is an abundant number, since it is smaller than the sum of its proper divisors (173229042).

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

133767438 is a wasteful number, since it uses less digits than its factorization.

133767438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12952.

The product of its digits is 254016, while the sum is 42.

The square root of 133767438 is about 11565.7873921320. The cubic root of 133767438 is about 511.4267851470.

The spelling of 133767438 in words is "one hundred thirty-three million, seven hundred sixty-seven thousand, four hundred thirty-eight".