28405371487 has 2 divisors, whose sum is σ = 28405371488. Its totient is φ = 28405371486.

The previous prime is 28405371439. The next prime is 28405371539. The reversal of 28405371487 is 78417350482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28405371487 - 2¹¹ = 28405369439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28405371487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28405371437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14202685743 + 14202685744.

It is an arithmetic number, because the mean of its divisors is an integer number (14202685744).

Almost surely, 2^28405371487 is an apocalyptic number.

28405371487 is a deficient number, since it is larger than the sum of its proper divisors (1).

28405371487 is an equidigital number, since it uses as much as digits as its factorization.

28405371487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 28405371487 in words is "twenty-eight billion, four hundred five million, three hundred seventy-one thousand, four hundred eighty-seven".