28478274942016 has 63 divisors (see below), whose sum is σ = 60032858957029. Its totient is φ = 13401199612928.

The previous prime is 28478274941993. The next prime is 28478274942041. The reversal of 28478274942016 is 61024947287482.

It is a happy number.

The square root of 28478274942016 is 5336504.

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

It can be written as a sum of positive squares in only one way, i.e., 22171667342400 + 6306607599616 = 4708680^2 + 2511296^2 .

It is a super-2 number, since 2×28478274942016² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 725744925 + ... + 725784163.

Almost surely, 2^{28478274942016} is an apocalyptic number.

28478274942016 is the 5336504-th square number.

It is an amenable number.

28478274942016 is an abundant number, since it is smaller than the sum of its proper divisors (31554584015013).

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

28478274942016 is an frugal number, since it uses more digits than its factorization.

28478274942016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78524 (or 39258 counting only the distinct ones).

The product of its (nonzero) digits is 86704128, while the sum is 64.

28478274942016 divided by its sum of digits (64) gives a square (444973045969 = 667063²).

The spelling of 28478274942016 in words is "twenty-eight trillion, four hundred seventy-eight billion, two hundred seventy-four million, nine hundred forty-two thousand, sixteen".