28402643387448 has 96 divisors (see below), whose sum is σ = 83931592782960. Its totient is φ = 8605354775040.

The previous prime is 28402643387423. The next prime is 28402643387477. The reversal of 28402643387448 is 84478334620482.

It is a happy number.

28402643387448 is a `hidden beast` number, since 2 + 84 + 0 + 2 + 6 + 4 + 33 + 87 + 448 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1391436 + ... + 7664292.

Almost surely, 2^{28402643387448} is an apocalyptic number.

It is an amenable number.

28402643387448 is an abundant number, since it is smaller than the sum of its proper divisors (55528949395512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28402643387448 is a wasteful number, since it uses less digits than its factorization.

28402643387448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6278597 (or 6278590 counting only the distinct ones).

The product of its (nonzero) digits is 198180864, while the sum is 63.

The spelling of 28402643387448 in words is "twenty-eight trillion, four hundred two billion, six hundred forty-three million, three hundred eighty-seven thousand, four hundred forty-eight".