28780248 has 48 divisors (see below), whose sum is σ = 83701080. Its totient is φ = 8222592.

The previous prime is 28780247. The next prime is 28780249. The reversal of 28780248 is 84208782.

It is an interprime number because it is at equal distance from previous prime (28780247) and next prime (28780249).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28780247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11061 + ... + 13412.

Almost surely, 2^28780248 is an apocalyptic number.

28780248 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28780248 is an abundant number, since it is smaller than the sum of its proper divisors (54920832).

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

28780248 is a wasteful number, since it uses less digits than its factorization.

28780248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24496 (or 24485 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 28780248 is about 5364.7225464137. The cubic root of 28780248 is about 306.4536821911.

The spelling of 28780248 in words is "twenty-eight million, seven hundred eighty thousand, two hundred forty-eight".