28138610 has 16 divisors (see below), whose sum is σ = 50760000. Its totient is φ = 11230896.

The previous prime is 28138603. The next prime is 28138631. The reversal of 28138610 is 1683182.

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, 2171 + ... + 7809.

It is an arithmetic number, because the mean of its divisors is an integer number (3172500).

Almost surely, 2^28138610 is an apocalyptic number.

28138610 is a deficient number, since it is larger than the sum of its proper divisors (22621390).

28138610 is a wasteful number, since it uses less digits than its factorization.

28138610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 28138610 is about 5304.5838668080. The cubic root of 28138610 is about 304.1591459536.

The spelling of 28138610 in words is "twenty-eight million, one hundred thirty-eight thousand, six hundred ten".