28020270 has 16 divisors (see below), whose sum is σ = 67248720. Its totient is φ = 7472064.

The previous prime is 28020263. The next prime is 28020277. The reversal of 28020270 is 7202082.

It is an interprime number because it is at equal distance from previous prime (28020263) and next prime (28020277).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28020277) 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, 466975 + ... + 467034.

It is an arithmetic number, because the mean of its divisors is an integer number (4203045).

Almost surely, 2^28020270 is an apocalyptic number.

28020270 is an abundant number, since it is smaller than the sum of its proper divisors (39228450).

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

28020270 is a wasteful number, since it uses less digits than its factorization.

28020270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934019.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 28020270 is about 5293.4176105801. The cubic root of 28020270 is about 303.7321552964.

The spelling of 28020270 in words is "twenty-eight million, twenty thousand, two hundred seventy".