28783260 has 72 divisors (see below), whose sum is σ = 95252976. Its totient is φ = 6977280.

The previous prime is 28783219. The next prime is 28783301. The reversal of 28783260 is 6238782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28783219) and next prime (28783301).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5289 + ... + 9248.

It is an arithmetic number, because the mean of its divisors is an integer number (1322958).

Almost surely, 2^28783260 is an apocalyptic number.

28783260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28783260 is an abundant number, since it is smaller than the sum of its proper divisors (66469716).

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

28783260 is a wasteful number, since it uses less digits than its factorization.

28783260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14563 (or 14558 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28783260 is about 5365.0032618816. The cubic root of 28783260 is about 306.4643724661.

The spelling of 28783260 in words is "twenty-eight million, seven hundred eighty-three thousand, two hundred sixty".