28938930454 has 16 divisors (see below), whose sum is σ = 49613971968. Its totient is φ = 12401304552.

The previous prime is 28938930451. The next prime is 28938930481. The reversal of 28938930454 is 45403983982.

It is a super-2 number, since 2×28938930454² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28938930395 and 28938930404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28938930451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84889 + ... + 255115.

It is an arithmetic number, because the mean of its divisors is an integer number (3100873248).

Almost surely, 2^28938930454 is an apocalyptic number.

28938930454 is a deficient number, since it is larger than the sum of its proper divisors (20675041514).

28938930454 is a wasteful number, since it uses less digits than its factorization.

28938930454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182379.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 28938930454 in words is "twenty-eight billion, nine hundred thirty-eight million, nine hundred thirty thousand, four hundred fifty-four".