28461904 has 10 divisors (see below), whose sum is σ = 55144970. Its totient is φ = 14230944.

The previous prime is 28461899. The next prime is 28461907. The reversal of 28461904 is 40916482.

It can be written as a sum of positive squares in only one way, i.e., 26501904 + 1960000 = 5148^2 + 1400^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28461904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28461907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 889419 + ... + 889450.

It is an arithmetic number, because the mean of its divisors is an integer number (5514497).

Almost surely, 2^28461904 is an apocalyptic number.

It is an amenable number.

28461904 is a deficient number, since it is larger than the sum of its proper divisors (26683066).

28461904 is a wasteful number, since it uses less digits than its factorization.

28461904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778877 (or 1778871 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28461904 is about 5334.9699155665. The cubic root of 28461904 is about 305.3195754540.

The spelling of 28461904 in words is "twenty-eight million, four hundred sixty-one thousand, nine hundred four".