28267861398 has 32 divisors (see below), whose sum is σ = 66358535424. Its totient is φ = 7858246752.

The previous prime is 28267861387. The next prime is 28267861411. The reversal of 28267861398 is 89316876282.

It is a congruent number.

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, 9093640 + ... + 9096747.

It is an arithmetic number, because the mean of its divisors is an integer number (2073704232).

Almost surely, 2^28267861398 is an apocalyptic number.

28267861398 is an abundant number, since it is smaller than the sum of its proper divisors (38090674026).

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

28267861398 is a wasteful number, since it uses less digits than its factorization.

28267861398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18190436.

The product of its digits is 13934592, while the sum is 60.

The spelling of 28267861398 in words is "twenty-eight billion, two hundred sixty-seven million, eight hundred sixty-one thousand, three hundred ninety-eight".