264128487 has 16 divisors (see below), whose sum is σ = 403054080. Its totient is φ = 150715872.

The previous prime is 264128483. The next prime is 264128497. The reversal of 264128487 is 784821462.

It is not a de Polignac number, because 264128487 - 2² = 264128483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264128483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6814 + ... + 23972.

It is an arithmetic number, because the mean of its divisors is an integer number (25190880).

Almost surely, 2^264128487 is an apocalyptic number.

264128487 is a deficient number, since it is larger than the sum of its proper divisors (138925593).

264128487 is a wasteful number, since it uses less digits than its factorization.

264128487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17902.

The product of its digits is 172032, while the sum is 42.

The square root of 264128487 is about 16252.0302424036. The cubic root of 264128487 is about 641.6109214592.

The spelling of 264128487 in words is "two hundred sixty-four million, one hundred twenty-eight thousand, four hundred eighty-seven".