129786864 has 40 divisors (see below), whose sum is σ = 340013952. Its totient is φ = 42651840.

The previous prime is 129786859. The next prime is 129786869. The reversal of 129786864 is 468687921.

It is an interprime number because it is at equal distance from previous prime (129786859) and next prime (129786869).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129786869) 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, 15634 + ... + 22449.

Almost surely, 2^129786864 is an apocalyptic number.

It is an amenable number.

129786864 is an abundant number, since it is smaller than the sum of its proper divisors (210227088).

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

129786864 is a wasteful number, since it uses less digits than its factorization.

129786864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38165 (or 38159 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 129786864 is about 11392.4037849788. The cubic root of 129786864 is about 506.3027033685.

The spelling of 129786864 in words is "one hundred twenty-nine million, seven hundred eighty-six thousand, eight hundred sixty-four".