28420163387 has 16 divisors (see below), whose sum is σ = 37297824000. Its totient is φ = 20980023840.

The previous prime is 28420163383. The next prime is 28420163461. The reversal of 28420163387 is 78336102482.

It is a cyclic number.

It is not a de Polignac number, because 28420163387 - 2² = 28420163383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28420163383) 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, 9711512 + ... + 9714437.

It is an arithmetic number, because the mean of its divisors is an integer number (2331114000).

Almost surely, 2^28420163387 is an apocalyptic number.

28420163387 is a deficient number, since it is larger than the sum of its proper divisors (8877660613).

28420163387 is a wasteful number, since it uses less digits than its factorization.

28420163387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19425986.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 28420163387 in words is "twenty-eight billion, four hundred twenty million, one hundred sixty-three thousand, three hundred eighty-seven".