284947740 has 432 divisors, whose sum is σ = 1146247200. Its totient is φ = 58544640.

The previous prime is 284947723. The next prime is 284947763. The reversal of 284947740 is 47749482.

It is a super-2 number, since 2×284947740² = 162390429062215200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3201616 + ... + 3201704.

It is an arithmetic number, because the mean of its divisors is an integer number (2653350).

Almost surely, 2^284947740 is an apocalyptic number.

284947740 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 284947740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573123600).

284947740 is an abundant number, since it is smaller than the sum of its proper divisors (861299460).

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

284947740 is a wasteful number, since it uses less digits than its factorization.

284947740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 284947740 is about 16880.3951375553. The cubic root of 284947740 is about 658.0442100973.

The spelling of 284947740 in words is "two hundred eighty-four million, nine hundred forty-seven thousand, seven hundred forty".