28015454 has 16 divisors (see below), whose sum is σ = 42793920. Its totient is φ = 13752960.

The previous prime is 28015453. The next prime is 28015457. The reversal of 28015454 is 45451082.

It is a super-2 number, since 2×28015454² = 1569731325652232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28015453) 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, 36434 + ... + 37194.

It is an arithmetic number, because the mean of its divisors is an integer number (2674620).

Almost surely, 2^28015454 is an apocalyptic number.

28015454 is a deficient number, since it is larger than the sum of its proper divisors (14778466).

28015454 is a wasteful number, since it uses less digits than its factorization.

28015454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 28015454 is about 5292.9626864356. The cubic root of 28015454 is about 303.7147529198.

The spelling of 28015454 in words is "twenty-eight million, fifteen thousand, four hundred fifty-four".