28742091955 has 8 divisors (see below), whose sum is σ = 34491574512. Its totient is φ = 22992964128.

The previous prime is 28742091943. The next prime is 28742091991. The reversal of 28742091955 is 55919024782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28742091955 - 2¹⁵ = 28742059187 is a prime.

It is a super-2 number, since 2×28742091955² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146077 + ... + 280753.

It is an arithmetic number, because the mean of its divisors is an integer number (4311446814).

Almost surely, 2^28742091955 is an apocalyptic number.

28742091955 is a deficient number, since it is larger than the sum of its proper divisors (5749482557).

28742091955 is a wasteful number, since it uses less digits than its factorization.

28742091955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177365.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 28742091955 in words is "twenty-eight billion, seven hundred forty-two million, ninety-one thousand, nine hundred fifty-five".