28890030015730 has 48 divisors (see below), whose sum is σ = 56347738671240. Its totient is φ = 10659923149824.

The previous prime is 28890030015727. The next prime is 28890030015731. The reversal of 28890030015730 is 3751003009882.

It can be written as a sum of positive squares in 12 ways, for example, as 125933426641 + 28764096589089 = 354871^2 + 5363217^2 .

It is not an unprimeable number, because it can be changed into a prime (28890030015731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3223917 + ... + 8256736.

Almost surely, 2^{28890030015730} is an apocalyptic number.

28890030015730 is a deficient number, since it is larger than the sum of its proper divisors (27457708655510).

28890030015730 is a wasteful number, since it uses less digits than its factorization.

28890030015730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11482175 (or 11482162 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 28890030015730 in words is "twenty-eight trillion, eight hundred ninety billion, thirty million, fifteen thousand, seven hundred thirty".