133157790 has 32 divisors (see below), whose sum is σ = 355088160. Its totient is φ = 35508672.

The previous prime is 133157777. The next prime is 133157831. The reversal of 133157790 is 97751331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246319 + ... + 246858.

It is an arithmetic number, because the mean of its divisors is an integer number (11096505).

Almost surely, 2^133157790 is an apocalyptic number.

133157790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133157790 is an abundant number, since it is smaller than the sum of its proper divisors (221930370).

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

133157790 is a wasteful number, since it uses less digits than its factorization.

133157790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493193 (or 493187 counting only the distinct ones).

The product of its (nonzero) digits is 19845, while the sum is 36.

The square root of 133157790 is about 11539.4016309339. The cubic root of 133157790 is about 510.6486556110.

The spelling of 133157790 in words is "one hundred thirty-three million, one hundred fifty-seven thousand, seven hundred ninety".