28071295978 has 32 divisors (see below), whose sum is σ = 46191762432. Its totient is φ = 12688498800.

The previous prime is 28071295963. The next prime is 28071296009. The reversal of 28071295978 is 87959217082.

It is a super-3 number, since 3×28071295978³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3352425 + ... + 3360787.

It is an arithmetic number, because the mean of its divisors is an integer number (1443492576).

Almost surely, 2^28071295978 is an apocalyptic number.

28071295978 is a deficient number, since it is larger than the sum of its proper divisors (18120466454).

28071295978 is a wasteful number, since it uses less digits than its factorization.

28071295978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9210.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 28071295978 in words is "twenty-eight billion, seventy-one million, two hundred ninety-five thousand, nine hundred seventy-eight".