28783320264720 has 1440 divisors, whose sum is σ = 128243410289280. Its totient is φ = 5729625538560.

The previous prime is 28783320264709. The next prime is 28783320264731. The reversal of 28783320264720 is 2746202338782.

28783320264720 is a `hidden beast` number, since 28 + 7 + 8 + 332 + 0 + 264 + 7 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (28783320264709) and next prime (28783320264731).

It is a super-2 number, since 2×28783320264720² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 489974550 + ... + 490033290.

It is an arithmetic number, because the mean of its divisors is an integer number (89057923812).

Almost surely, 2^{28783320264720} is an apocalyptic number.

28783320264720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28783320264720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64121705144640).

28783320264720 is an abundant number, since it is smaller than the sum of its proper divisors (99460090024560).

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

28783320264720 is a wasteful number, since it uses less digits than its factorization.

28783320264720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58853 (or 58837 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 54.

The spelling of 28783320264720 in words is "twenty-eight trillion, seven hundred eighty-three billion, three hundred twenty million, two hundred sixty-four thousand, seven hundred twenty".