1028025687 has 16 divisors (see below), whose sum is σ = 1540320768. Its totient is φ = 605124960.

The previous prime is 1028025659. The next prime is 1028025697. The reversal of 1028025687 is 7865208201.

It is not a de Polignac number, because 1028025687 - 2⁶ = 1028025623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028025637) 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, 572139 + ... + 573932.

It is an arithmetic number, because the mean of its divisors is an integer number (96270048).

Almost surely, 2^1028025687 is an apocalyptic number.

1028025687 is a deficient number, since it is larger than the sum of its proper divisors (512295081).

1028025687 is a wasteful number, since it uses less digits than its factorization.

1028025687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146110.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 1028025687 is about 32062.8396590196. The cubic root of 1028025687 is about 1009.2559585698.

The spelling of 1028025687 in words is "one billion, twenty-eight million, twenty-five thousand, six hundred eighty-seven".