28401704 has 32 divisors (see below), whose sum is σ = 55779840. Its totient is φ = 13540800.

The previous prime is 28401689. The next prime is 28401707. The reversal of 28401704 is 40710482.

It is not an unprimeable number, because it can be changed into a prime (28401707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16802 + ... + 18414.

It is an arithmetic number, because the mean of its divisors is an integer number (1743120).

Almost surely, 2^28401704 is an apocalyptic number.

It is an amenable number.

28401704 is a deficient number, since it is larger than the sum of its proper divisors (27378136).

28401704 is a wasteful number, since it uses less digits than its factorization.

28401704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721 (or 1717 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 28401704 is about 5329.3249103428. The cubic root of 28401704 is about 305.1041622192.

The spelling of 28401704 in words is "twenty-eight million, four hundred one thousand, seven hundred four".