28897376394384 has 75 divisors (see below), whose sum is σ = 83637951206403. Its totient is φ = 9632394290592.

The previous prime is 28897376394373. The next prime is 28897376394407. The reversal of 28897376394384 is 48349367379882.

The square root of 28897376394384 is 5375628.

It is a perfect power (a square), and thus also a powerful number.

28897376394384 is a `hidden beast` number, since 2 + 8 + 8 + 97 + 3 + 7 + 63 + 94 + 384 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 193447947 + ... + 193597269.

Almost surely, 2^{28897376394384} is an apocalyptic number.

28897376394384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

28897376394384 is the 5375628-th square number.

It is an amenable number.

28897376394384 is an abundant number, since it is smaller than the sum of its proper divisors (54740574812019).

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

28897376394384 is an frugal number, since it uses more digits than its factorization.

28897376394384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298666 (or 149328 counting only the distinct ones).

The product of its digits is 10534551552, while the sum is 81.

28897376394384 divided by its sum of digits (81) gives a square (356757733264 = 597292²).

The spelling of 28897376394384 in words is "twenty-eight trillion, eight hundred ninety-seven billion, three hundred seventy-six million, three hundred ninety-four thousand, three hundred eighty-four".