247984380 has 144 divisors (see below), whose sum is σ = 868969920. Its totient is φ = 56070144.

The previous prime is 247984379. The next prime is 247984381. The reversal of 247984380 is 83489742.

It is an interprime number because it is at equal distance from previous prime (247984379) and next prime (247984381).

It is a super-2 number, since 2×247984380² = 122992505447968800, 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 not an unprimeable number, because it can be changed into a prime (247984381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121206 + ... + 123234.

Almost surely, 2^247984380 is an apocalyptic number.

247984380 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 247984380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434484960).

247984380 is an abundant number, since it is smaller than the sum of its proper divisors (620985540).

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

247984380 is a wasteful number, since it uses less digits than its factorization.

247984380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148 (or 2143 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 247984380 is about 15747.5198047185. The cubic root of 247984380 is about 628.2629397804.

The spelling of 247984380 in words is "two hundred forty-seven million, nine hundred eighty-four thousand, three hundred eighty".