28461438619 has 4 divisors (see below), whose sum is σ = 29698892496. Its totient is φ = 27223984744.

The previous prime is 28461438611. The next prime is 28461438637. The reversal of 28461438619 is 91683416482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28461438619 - 2³ = 28461438611 is a prime.

It is a super-2 number, since 2×28461438619² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28461438611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618726904 + ... + 618726949.

It is an arithmetic number, because the mean of its divisors is an integer number (7424723124).

Almost surely, 2^28461438619 is an apocalyptic number.

28461438619 is a deficient number, since it is larger than the sum of its proper divisors (1237453877).

28461438619 is a wasteful number, since it uses less digits than its factorization.

28461438619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237453876.

The product of its digits is 1990656, while the sum is 52.

The spelling of 28461438619 in words is "twenty-eight billion, four hundred sixty-one million, four hundred thirty-eight thousand, six hundred nineteen".