28401670 has 16 divisors (see below), whose sum is σ = 55770768. Its totient is φ = 10327840.

The previous prime is 28401649. The next prime is 28401683. The reversal of 28401670 is 7610482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128989 + ... + 129208.

It is an arithmetic number, because the mean of its divisors is an integer number (3485673).

Almost surely, 2^28401670 is an apocalyptic number.

28401670 is a deficient number, since it is larger than the sum of its proper divisors (27369098).

28401670 is a wasteful number, since it uses less digits than its factorization.

28401670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258215.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28401670 is about 5329.3217204444. The cubic root of 28401670 is about 305.1040404713.

The spelling of 28401670 in words is "twenty-eight million, four hundred one thousand, six hundred seventy".