28357687501 has 16 divisors (see below), whose sum is σ = 33364941120. Its totient is φ = 23761221120.

The previous prime is 28357687493. The next prime is 28357687513. The reversal of 28357687501 is 10578675382.

It is a happy number.

It is not a de Polignac number, because 28357687501 - 2³ = 28357687493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357687901) 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, 51091 + ... + 243568.

It is an arithmetic number, because the mean of its divisors is an integer number (2085308820).

Almost surely, 2^28357687501 is an apocalyptic number.

It is an amenable number.

28357687501 is a deficient number, since it is larger than the sum of its proper divisors (5007253619).

28357687501 is a wasteful number, since it uses less digits than its factorization.

28357687501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295356.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 28357687501 in words is "twenty-eight billion, three hundred fifty-seven million, six hundred eighty-seven thousand, five hundred one".