133445590 has 8 divisors (see below), whose sum is σ = 240202080. Its totient is φ = 53378232.

The previous prime is 133445579. The next prime is 133445591. The reversal of 133445590 is 95544331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133445591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6672270 + ... + 6672289.

It is an arithmetic number, because the mean of its divisors is an integer number (30025260).

Almost surely, 2^133445590 is an apocalyptic number.

133445590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133445590 is a deficient number, since it is larger than the sum of its proper divisors (106756490).

133445590 is a wasteful number, since it uses less digits than its factorization.

133445590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13344566.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 133445590 is about 11551.8652173578. The cubic root of 133445590 is about 511.0162869491.

The spelling of 133445590 in words is "one hundred thirty-three million, four hundred forty-five thousand, five hundred ninety".