387720224 has 96 divisors (see below), whose sum is σ = 847397376. Its totient is φ = 173813760.

The previous prime is 387720217. The next prime is 387720233. The reversal of 387720224 is 422027783.

It is a super-2 number, since 2×387720224² = 300653944197220352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399574 + ... + 1399850.

It is an arithmetic number, because the mean of its divisors is an integer number (8827056).

Almost surely, 2^387720224 is an apocalyptic number.

387720224 is a gapful number since it is divisible by the number (34) 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 387720224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423698688).

387720224 is an abundant number, since it is smaller than the sum of its proper divisors (459677152).

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

387720224 is a wasteful number, since it uses less digits than its factorization.

387720224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 387720224 is about 19690.6125856968. The cubic root of 387720224 is about 729.1879529648.

The spelling of 387720224 in words is "three hundred eighty-seven million, seven hundred twenty thousand, two hundred twenty-four".