428625693287 has 8 divisors (see below), whose sum is σ = 467603879952. Its totient is φ = 389649542400.

The previous prime is 428625693233. The next prime is 428625693299. The reversal of 428625693287 is 782396526824.

It is a happy number.

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 428625693287 - 2²⁰ = 428624644711 is a prime.

It is a super-2 number, since 2×428625693287² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428625293287) 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, 50768 + ... + 927269.

It is an arithmetic number, because the mean of its divisors is an integer number (58450484994).

Almost surely, 2^428625693287 is an apocalyptic number.

428625693287 is a deficient number, since it is larger than the sum of its proper divisors (38978186665).

428625693287 is a wasteful number, since it uses less digits than its factorization.

428625693287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017889.

The product of its digits is 69672960, while the sum is 62.

The spelling of 428625693287 in words is "four hundred twenty-eight billion, six hundred twenty-five million, six hundred ninety-three thousand, two hundred eighty-seven".