128507467 has 8 divisors (see below), whose sum is σ = 140296752. Its totient is φ = 116736000.

The previous prime is 128507459. The next prime is 128507479. The reversal of 128507467 is 764705821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128507467 - 2³ = 128507459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128507767) 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, 13963 + ... + 21259.

It is an arithmetic number, because the mean of its divisors is an integer number (17537094).

Almost surely, 2^128507467 is an apocalyptic number.

128507467 is a deficient number, since it is larger than the sum of its proper divisors (11789285).

128507467 is a wasteful number, since it uses less digits than its factorization.

128507467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8909.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 128507467 is about 11336.1133992211. The cubic root of 128507467 is about 504.6335504454.

The spelling of 128507467 in words is "one hundred twenty-eight million, five hundred seven thousand, four hundred sixty-seven".