28291454019 has 12 divisors (see below), whose sum is σ = 42183673792. Its totient is φ = 18252550800.

The previous prime is 28291454003. The next prime is 28291454021. The reversal of 28291454019 is 91045419282.

It is a happy number.

28291454019 is a `hidden beast` number, since 2 + 8 + 2 + 91 + 4 + 540 + 19 = 666.

It is not a de Polignac number, because 28291454019 - 2⁴ = 28291454003 is a prime.

It is a super-2 number, since 2×28291454019² (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 (28291454029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50701252 + ... + 50701809.

Almost surely, 2^28291454019 is an apocalyptic number.

28291454019 is a deficient number, since it is larger than the sum of its proper divisors (13892219773).

28291454019 is a wasteful number, since it uses less digits than its factorization.

28291454019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101403098 (or 101403095 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 28291454019 in words is "twenty-eight billion, two hundred ninety-one million, four hundred fifty-four thousand, nineteen".