28874457458 has 48 divisors (see below), whose sum is σ = 55045129824. Its totient is φ = 11233031040.

The previous prime is 28874457401. The next prime is 28874457461. The reversal of 28874457458 is 85475447882.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28874457458.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 716666 + ... + 755882.

It is an arithmetic number, because the mean of its divisors is an integer number (1146773538).

Almost surely, 2^28874457458 is an apocalyptic number.

28874457458 is a deficient number, since it is larger than the sum of its proper divisors (26170672366).

28874457458 is a wasteful number, since it uses less digits than its factorization.

28874457458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39927 (or 39920 counting only the distinct ones).

The product of its digits is 80281600, while the sum is 62.

The spelling of 28874457458 in words is "twenty-eight billion, eight hundred seventy-four million, four hundred fifty-seven thousand, four hundred fifty-eight".