133869800 has 48 divisors (see below), whose sum is σ = 321993900. Its totient is φ = 51699200.

The previous prime is 133869779. The next prime is 133869803. The reversal of 133869800 is 8968331.

It can be written as a sum of positive squares in 6 ways, for example, as 48972004 + 84897796 = 6998^2 + 9214^2 .

It is a super-2 number, since 2×133869800² = 35842246704080000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133869803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5741 + ... + 17340.

Almost surely, 2^133869800 is an apocalyptic number.

133869800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133869800 is an abundant number, since it is smaller than the sum of its proper divisors (188124100).

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

133869800 is a wasteful number, since it uses less digits than its factorization.

133869800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23126 (or 23117 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 133869800 is about 11570.2117525999. The cubic root of 133869800 is about 511.5572038341.

The spelling of 133869800 in words is "one hundred thirty-three million, eight hundred sixty-nine thousand, eight hundred".