28320642474 has 32 divisors (see below), whose sum is σ = 57662280000. Its totient is φ = 9271473024.

The previous prime is 28320642461. The next prime is 28320642487. The reversal of 28320642474 is 47424602382.

It is an interprime number because it is at equal distance from previous prime (28320642461) and next prime (28320642487).

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, 98404 + ... + 257535.

It is an arithmetic number, because the mean of its divisors is an integer number (1801946250).

Almost surely, 2^28320642474 is an apocalyptic number.

28320642474 is an abundant number, since it is smaller than the sum of its proper divisors (29341637526).

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

28320642474 is a wasteful number, since it uses less digits than its factorization.

28320642474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356182.

The product of its (nonzero) digits is 516096, while the sum is 42.

The spelling of 28320642474 in words is "twenty-eight billion, three hundred twenty million, six hundred forty-two thousand, four hundred seventy-four".