28673979453 has 32 divisors (see below), whose sum is σ = 48634041600. Its totient is φ = 16356273408.

The previous prime is 28673979427. The next prime is 28673979479. The reversal of 28673979453 is 35497937682.

28673979453 is a `hidden beast` number, since 2 + 86 + 7 + 39 + 79 + 453 = 666.

It is an interprime number because it is at equal distance from previous prime (28673979427) and next prime (28673979479).

It is not a de Polignac number, because 28673979453 - 2⁹ = 28673978941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28673979853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25776 + ... + 240857.

It is an arithmetic number, because the mean of its divisors is an integer number (1519813800).

Almost surely, 2^28673979453 is an apocalyptic number.

It is an amenable number.

28673979453 is a deficient number, since it is larger than the sum of its proper divisors (19960062147).

28673979453 is a wasteful number, since it uses less digits than its factorization.

28673979453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267218 (or 267212 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The spelling of 28673979453 in words is "twenty-eight billion, six hundred seventy-three million, nine hundred seventy-nine thousand, four hundred fifty-three".