28011403918 has 4 divisors (see below), whose sum is σ = 42017105880. Its totient is φ = 14005701958.

The previous prime is 28011403909. The next prime is 28011403943. The reversal of 28011403918 is 81930411082.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7002850978 + ... + 7002850981.

It is an arithmetic number, because the mean of its divisors is an integer number (10504276470).

Almost surely, 2^28011403918 is an apocalyptic number.

28011403918 is a deficient number, since it is larger than the sum of its proper divisors (14005701962).

28011403918 is a wasteful number, since it uses less digits than its factorization.

28011403918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14005701961.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 28011403918 in words is "twenty-eight billion, eleven million, four hundred three thousand, nine hundred eighteen".