133436736 has 42 divisors (see below), whose sum is σ = 382473962. Its totient is φ = 44478720.

The previous prime is 133436711. The next prime is 133436747. The reversal of 133436736 is 637634331.

It can be written as a sum of positive squares in only one way, i.e., 108993600 + 24443136 = 10440^2 + 4944^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 133436736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115255 + ... + 116406.

Almost surely, 2^133436736 is an apocalyptic number.

133436736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133436736 is an abundant number, since it is smaller than the sum of its proper divisors (249037226).

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

133436736 is a wasteful number, since it uses less digits than its factorization.

133436736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231679 (or 231666 counting only the distinct ones).

The product of its digits is 81648, while the sum is 36.

The square root of 133436736 is about 11551.4819828453. The cubic root of 133436736 is about 511.0049848690.

The spelling of 133436736 in words is "one hundred thirty-three million, four hundred thirty-six thousand, seven hundred thirty-six".