28423407825 has 36 divisors (see below), whose sum is σ = 51772378320. Its totient is φ = 14902209120.

The previous prime is 28423407791. The next prime is 28423407833. The reversal of 28423407825 is 52870432482.

28423407825 is a `hidden beast` number, since 284 + 2 + 340 + 7 + 8 + 25 = 666.

It is not a de Polignac number, because 28423407825 - 2¹⁶ = 28423342289 is a prime.

It is a super-2 number, since 2×28423407825² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1057287 + ... + 1083836.

It is an arithmetic number, because the mean of its divisors is an integer number (1438121620).

Almost surely, 2^28423407825 is an apocalyptic number.

28423407825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28423407825 is a deficient number, since it is larger than the sum of its proper divisors (23348970495).

28423407825 is a wasteful number, since it uses less digits than its factorization.

28423407825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141198 (or 2141190 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The spelling of 28423407825 in words is "twenty-eight billion, four hundred twenty-three million, four hundred seven thousand, eight hundred twenty-five".