28401346911 has 48 divisors (see below), whose sum is σ = 45454424064. Its totient is φ = 15447672000.

The previous prime is 28401346907. The next prime is 28401346957. The reversal of 28401346911 is 11964310482.

It is not a de Polignac number, because 28401346911 - 2² = 28401346907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28401346911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28401346901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1219506 + ... + 1242576.

It is an arithmetic number, because the mean of its divisors is an integer number (946967168).

Almost surely, 2^28401346911 is an apocalyptic number.

28401346911 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28401346911 is a deficient number, since it is larger than the sum of its proper divisors (17053077153).

28401346911 is a wasteful number, since it uses less digits than its factorization.

28401346911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23204 (or 23173 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 28401346911 in words is "twenty-eight billion, four hundred one million, three hundred forty-six thousand, nine hundred eleven".