133656290 has 16 divisors (see below), whose sum is σ = 244173312. Its totient is φ = 52664304.

The previous prime is 133656277. The next prime is 133656319. The reversal of 133656290 is 92656331.

It is a self number, because there is not a number n which added to its sum of digits gives 133656290.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99074 + ... + 100413.

It is an arithmetic number, because the mean of its divisors is an integer number (15260832).

Almost surely, 2^133656290 is an apocalyptic number.

133656290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133656290 is a deficient number, since it is larger than the sum of its proper divisors (110517022).

133656290 is a wasteful number, since it uses less digits than its factorization.

133656290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199561.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 133656290 is about 11560.9813597289. The cubic root of 133656290 is about 511.2850969145.

The spelling of 133656290 in words is "one hundred thirty-three million, six hundred fifty-six thousand, two hundred ninety".