28687293007 has 16 divisors (see below), whose sum is σ = 30717865728. Its totient is φ = 26725628160.

The previous prime is 28687292969. The next prime is 28687293043. The reversal of 28687293007 is 70039278682.

It is a cyclic number.

It is not a de Polignac number, because 28687293007 - 2²⁷ = 28553075279 is a prime.

It is a super-2 number, since 2×28687293007² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28687293067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308032 + ... + 390202.

It is an arithmetic number, because the mean of its divisors is an integer number (1919866608).

Almost surely, 2^28687293007 is an apocalyptic number.

28687293007 is a deficient number, since it is larger than the sum of its proper divisors (2030572721).

28687293007 is a wasteful number, since it uses less digits than its factorization.

28687293007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82590.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 28687293007 in words is "twenty-eight billion, six hundred eighty-seven million, two hundred ninety-three thousand, seven".