133457870 has 128 divisors (see below), whose sum is σ = 313286400. Its totient is φ = 40642560.

The previous prime is 133457867. The next prime is 133457873. The reversal of 133457870 is 78754331.

It is an interprime number because it is at equal distance from previous prime (133457867) and next prime (133457873).

It is a super-2 number, since 2×133457870² = 35622006129873800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133457873) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1828154 + ... + 1828226.

It is an arithmetic number, because the mean of its divisors is an integer number (2447550).

Almost surely, 2^133457870 is an apocalyptic number.

133457870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133457870 is an abundant number, since it is smaller than the sum of its proper divisors (179828530).

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

133457870 is a wasteful number, since it uses less digits than its factorization.

133457870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 133457870 is about 11552.3967210272. The cubic root of 133457870 is about 511.0319614712.

The spelling of 133457870 in words is "one hundred thirty-three million, four hundred fifty-seven thousand, eight hundred seventy".