1869028065 has 12 divisors (see below), whose sum is σ = 3239648724. Its totient is φ = 996814944.

The previous prime is 1869027997. The next prime is 1869028079. The reversal of 1869028065 is 5608209681.

It can be written as a sum of positive squares in 2 ways, for example, as 1302921216 + 566106849 = 36096^2 + 23793^2 .

It is not a de Polignac number, because 1869028065 - 2²⁰ = 1867979489 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 41533957 = 1869028065 / (1 + 8 + 6 + 9 + 0 + 2 + 8 + 0 + 6 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1869028065.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20766934 + ... + 20767023.

It is an arithmetic number, because the mean of its divisors is an integer number (269970727).

Almost surely, 2^1869028065 is an apocalyptic number.

1869028065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1869028065 is a deficient number, since it is larger than the sum of its proper divisors (1370620659).

1869028065 is a wasteful number, since it uses less digits than its factorization.

1869028065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41533968 (or 41533965 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1869028065 is about 43232.2572276767. The cubic root of 1869028065 is about 1231.7954840651.

The spelling of 1869028065 in words is "one billion, eight hundred sixty-nine million, twenty-eight thousand, sixty-five".