28406929898623 has 2 divisors, whose sum is σ = 28406929898624. Its totient is φ = 28406929898622.

The previous prime is 28406929898587. The next prime is 28406929898689. The reversal of 28406929898623 is 32689892960482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28406929898623 - 2¹³ = 28406929890431 is a prime.

It is a super-2 number, since 2×28406929898623² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28406929898623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28406929898693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14203464949311 + 14203464949312.

It is an arithmetic number, because the mean of its divisors is an integer number (14203464949312).

Almost surely, 2^{28406929898623} is an apocalyptic number.

28406929898623 is a deficient number, since it is larger than the sum of its proper divisors (1).

28406929898623 is an equidigital number, since it uses as much as digits as its factorization.

28406929898623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1289945088, while the sum is 76.

The spelling of 28406929898623 in words is "twenty-eight trillion, four hundred six billion, nine hundred twenty-nine million, eight hundred ninety-eight thousand, six hundred twenty-three".