28249270 has 32 divisors (see below), whose sum is σ = 58330368. Its totient is φ = 9649248.

The previous prime is 28249261. The next prime is 28249279. The reversal of 28249270 is 7294282.

It is an interprime number because it is at equal distance from previous prime (28249261) and next prime (28249279).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28249279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23709 + ... + 24871.

It is an arithmetic number, because the mean of its divisors is an integer number (1822824).

Almost surely, 2^28249270 is an apocalyptic number.

28249270 is an abundant number, since it is smaller than the sum of its proper divisors (30081098).

28249270 is a wasteful number, since it uses less digits than its factorization.

28249270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28249270 is about 5315.0042333003. The cubic root of 28249270 is about 304.5573440750.

The spelling of 28249270 in words is "twenty-eight million, two hundred forty-nine thousand, two hundred seventy".