28094293164025 has 45 divisors (see below), whose sum is σ = 38324752407165. Its totient is φ = 20429881032000.

The previous prime is 28094293163971. The next prime is 28094293164163. The reversal of 28094293164025 is 52046139249082.

The square root of 28094293164025 is 5300405.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 9998832140649 + 18095461023376 = 3162093^2 + 4253876^2 .

It is not a de Polignac number, because 28094293164025 - 2¹³ = 28094293155833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 3206740645 + ... + 3206749405.

Almost surely, 2^{28094293164025} is an apocalyptic number.

28094293164025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28094293164025 is the 5300405-th square number.

28094293164025 is the 2650203-rd centered octagonal number.

It is an amenable number.

28094293164025 is a deficient number, since it is larger than the sum of its proper divisors (10230459243140).

28094293164025 is an frugal number, since it uses more digits than its factorization.

28094293164025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17576 (or 8777 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 28094293164025 in words is "twenty-eight trillion, ninety-four billion, two hundred ninety-three million, one hundred sixty-four thousand, twenty-five".