28402452806428 has 24 divisors (see below), whose sum is σ = 50074154323200. Its totient is φ = 14095601682288.

The previous prime is 28402452806423. The next prime is 28402452806461. The reversal of 28402452806428 is 82460825420482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28402452806423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3993850 + ... + 8529697.

It is an arithmetic number, because the mean of its divisors is an integer number (2086423096800).

Almost surely, 2^{28402452806428} is an apocalyptic number.

It is an amenable number.

28402452806428 is a deficient number, since it is larger than the sum of its proper divisors (21671701516772).

28402452806428 is a wasteful number, since it uses less digits than its factorization.

28402452806428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12527769 (or 12527767 counting only the distinct ones).

The product of its (nonzero) digits is 15728640, while the sum is 55.

The spelling of 28402452806428 in words is "twenty-eight trillion, four hundred two billion, four hundred fifty-two million, eight hundred six thousand, four hundred twenty-eight".