28506154707 has 12 divisors (see below), whose sum is σ = 41207320440. Its totient is φ = 18989443008.

The previous prime is 28506154657. The next prime is 28506154711. The reversal of 28506154707 is 70745160582.

28506154707 is a `hidden beast` number, since 28 + 5 + 0 + 615 + 4 + 7 + 0 + 7 = 666.

It is not a de Polignac number, because 28506154707 - 2¹⁵ = 28506121939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28506154717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1209357 + ... + 1232702.

It is an arithmetic number, because the mean of its divisors is an integer number (3433943370).

Almost surely, 2^28506154707 is an apocalyptic number.

28506154707 is a deficient number, since it is larger than the sum of its proper divisors (12701165733).

28506154707 is a wasteful number, since it uses less digits than its factorization.

28506154707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443362 (or 2443359 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 28506154707 in words is "twenty-eight billion, five hundred six million, one hundred fifty-four thousand, seven hundred seven".