133673440 has 24 divisors (see below), whose sum is σ = 315803880. Its totient is φ = 53469312.

The previous prime is 133673437. The next prime is 133673453. The reversal of 133673440 is 44376331.

It is a super-2 number, since 2×133673440² = 35737177122867200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417570 + ... + 417889.

It is an arithmetic number, because the mean of its divisors is an integer number (13158495).

Almost surely, 2^133673440 is an apocalyptic number.

133673440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133673440 is an abundant number, since it is smaller than the sum of its proper divisors (182130440).

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

133673440 is an equidigital number, since it uses as much as digits as its factorization.

133673440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835474 (or 835466 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 133673440 is about 11561.7230549776. The cubic root of 133673440 is about 511.3069643587.

It can be divided in two parts, 13367 and 3440, that added together give a 5-th power (16807 = 7⁵).

The spelling of 133673440 in words is "one hundred thirty-three million, six hundred seventy-three thousand, four hundred forty".