28820894382648 has 96 divisors (see below), whose sum is σ = 82448370301440. Its totient is φ = 9080851913280.

The previous prime is 28820894382601. The next prime is 28820894382671. The reversal of 28820894382648 is 84628349802882.

It is a happy number.

28820894382648 is a `hidden beast` number, since 2 + 88 + 20 + 8 + 94 + 382 + 64 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 150050386 + ... + 150242337.

It is an arithmetic number, because the mean of its divisors is an integer number (858837190640).

Almost surely, 2^{28820894382648} is an apocalyptic number.

It is an amenable number.

28820894382648 is an abundant number, since it is smaller than the sum of its proper divisors (53627475918792).

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

28820894382648 is a wasteful number, since it uses less digits than its factorization.

28820894382648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300292809 (or 300292802 counting only the distinct ones).

The product of its (nonzero) digits is 679477248, while the sum is 72.

The spelling of 28820894382648 in words is "twenty-eight trillion, eight hundred twenty billion, eight hundred ninety-four million, three hundred eighty-two thousand, six hundred forty-eight".