28100134947 has 8 divisors (see below), whose sum is σ = 37473034240. Its totient is φ = 18730329480.

The previous prime is 28100134943. The next prime is 28100134967. The reversal of 28100134947 is 74943100182.

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

It is not a de Polignac number, because 28100134947 - 2² = 28100134943 is a prime.

It is a super-2 number, since 2×28100134947² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28100134943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752179 + ... + 788652.

It is an arithmetic number, because the mean of its divisors is an integer number (4684129280).

Almost surely, 2^28100134947 is an apocalyptic number.

28100134947 is a deficient number, since it is larger than the sum of its proper divisors (9372899293).

28100134947 is a wasteful number, since it uses less digits than its factorization.

28100134947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546913.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 28100134947 in words is "twenty-eight billion, one hundred million, one hundred thirty-four thousand, nine hundred forty-seven".