28150400785 has 8 divisors (see below), whose sum is σ = 36378979560. Its totient is φ = 20787988224.

The previous prime is 28150400777. The next prime is 28150400797. The reversal of 28150400785 is 58700405182.

It can be written as a sum of positive squares in 4 ways, for example, as 180848704 + 27969552081 = 13448^2 + 167241^2 .

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 28150400785 - 2³ = 28150400777 is a prime.

It is a super-2 number, since 2×28150400785² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216541480 + ... + 216541609.

It is an arithmetic number, because the mean of its divisors is an integer number (4547372445).

Almost surely, 2^28150400785 is an apocalyptic number.

It is an amenable number.

28150400785 is a deficient number, since it is larger than the sum of its proper divisors (8228578775).

28150400785 is a wasteful number, since it uses less digits than its factorization.

28150400785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433083107.

The product of its (nonzero) digits is 89600, while the sum is 40.

The spelling of 28150400785 in words is "twenty-eight billion, one hundred fifty million, four hundred thousand, seven hundred eighty-five".