133238860 has 24 divisors (see below), whose sum is σ = 296261280. Its totient is φ = 50160384.

The previous prime is 133238851. The next prime is 133238869. The reversal of 133238860 is 68832331.

It is an interprime number because it is at equal distance from previous prime (133238851) and next prime (133238869).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (133238869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195600 + ... + 196279.

It is an arithmetic number, because the mean of its divisors is an integer number (12344220).

Almost surely, 2^133238860 is an apocalyptic number.

133238860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133238860 is an abundant number, since it is smaller than the sum of its proper divisors (163022420).

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

133238860 is a wasteful number, since it uses less digits than its factorization.

133238860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391905 (or 391903 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 133238860 is about 11542.9138435665. The cubic root of 133238860 is about 510.7522667426.

The spelling of 133238860 in words is "one hundred thirty-three million, two hundred thirty-eight thousand, eight hundred sixty".