28907625002978 has 18 divisors (see below), whose sum is σ = 43771703869803. Its totient is φ = 14318327149060.

The previous prime is 28907625002923. The next prime is 28907625003029. The reversal of 28907625002978 is 87920052670982.

It can be written as a sum of positive squares in only one way, i.e., 14453812501489 + 14453812501489 = 3801817^2 + 3801817^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3801817.

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, 813571073 + ... + 813606603.

Almost surely, 2^{28907625002978} is an apocalyptic number.

28907625002978 is a deficient number, since it is larger than the sum of its proper divisors (14864078866825).

28907625002978 is an frugal number, since it uses more digits than its factorization.

28907625002978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71278 (or 35640 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 28907625002978 in words is "twenty-eight trillion, nine hundred seven billion, six hundred twenty-five million, two thousand, nine hundred seventy-eight".