133787864 has 32 divisors (see below), whose sum is σ = 288533280. Its totient is φ = 56968704.

The previous prime is 133787861. The next prime is 133787887. The reversal of 133787864 is 468787331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133787861) 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, 1184 + ... + 16400.

It is an arithmetic number, because the mean of its divisors is an integer number (9016665).

Almost surely, 2^133787864 is an apocalyptic number.

133787864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

133787864 is an abundant number, since it is smaller than the sum of its proper divisors (154745416).

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

133787864 is a wasteful number, since it uses less digits than its factorization.

133787864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15387 (or 15383 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

The square root of 133787864 is about 11566.6703938515. The cubic root of 133787864 is about 511.4528150788.

The spelling of 133787864 in words is "one hundred thirty-three million, seven hundred eighty-seven thousand, eight hundred sixty-four".