28901144268 has 18 divisors (see below), whose sum is σ = 73055670324. Its totient is φ = 9633714744.

The previous prime is 28901144267. The next prime is 28901144269. The reversal of 28901144268 is 86244110982.

28901144268 is a `hidden beast` number, since 28 + 90 + 114 + 426 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (28901144267) and next prime (28901144269).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×28901144268² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28901144267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 401404746 + ... + 401404817.

Almost surely, 2^28901144268 is an apocalyptic number.

It is an amenable number.

28901144268 is an abundant number, since it is smaller than the sum of its proper divisors (44154526056).

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

28901144268 is a wasteful number, since it uses less digits than its factorization.

28901144268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802809573 (or 802809568 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 28901144268 in words is "twenty-eight billion, nine hundred one million, one hundred forty-four thousand, two hundred sixty-eight".