28107390 has 32 divisors (see below), whose sum is σ = 69636096. Its totient is φ = 7253280.

The previous prime is 28107379. The next prime is 28107407. The reversal of 28107390 is 9370182.

It is a happy number.

It is a super-2 number, since 2×28107390² = 1580050745224200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14182 + ... + 16041.

It is an arithmetic number, because the mean of its divisors is an integer number (2176128).

Almost surely, 2^28107390 is an apocalyptic number.

28107390 is an abundant number, since it is smaller than the sum of its proper divisors (41528706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28107390 is a wasteful number, since it uses less digits than its factorization.

28107390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30264.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 28107390 is about 5301.6403122053. The cubic root of 28107390 is about 304.0466153701.

The spelling of 28107390 in words is "twenty-eight million, one hundred seven thousand, three hundred ninety".