28745400454 has 4 divisors (see below), whose sum is σ = 43118100684. Its totient is φ = 14372700226.

The previous prime is 28745400433. The next prime is 28745400461. The reversal of 28745400454 is 45400454782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45400454782 = 2 ⋅22700227391.

It is a super-2 number, since 2×28745400454² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28745400454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7186350112 + ... + 7186350115.

It is an arithmetic number, because the mean of its divisors is an integer number (10779525171).

Almost surely, 2^28745400454 is an apocalyptic number.

28745400454 is a deficient number, since it is larger than the sum of its proper divisors (14372700230).

28745400454 is a wasteful number, since it uses less digits than its factorization.

28745400454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14372700229.

The product of its (nonzero) digits is 716800, while the sum is 43.

The spelling of 28745400454 in words is "twenty-eight billion, seven hundred forty-five million, four hundred thousand, four hundred fifty-four".