1388247224 has 64 divisors (see below), whose sum is σ = 3269112000. Its totient is φ = 549182592.

The previous prime is 1388247221. The next prime is 1388247227. The reversal of 1388247224 is 4227428831.

It is an interprime number because it is at equal distance from previous prime (1388247221) and next prime (1388247227).

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388247221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16214 + ... + 55130.

It is an arithmetic number, because the mean of its divisors is an integer number (51079875).

Almost surely, 2^1388247224 is an apocalyptic number.

1388247224 is a gapful number since it is divisible by the number (14) 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 1388247224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634556000).

1388247224 is an abundant number, since it is smaller than the sum of its proper divisors (1880864776).

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

1388247224 is a wasteful number, since it uses less digits than its factorization.

1388247224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38957 (or 38939 counting only the distinct ones).

The product of its digits is 172032, while the sum is 41.

The square root of 1388247224 is about 37259.1897925867. The cubic root of 1388247224 is about 1115.5497363554.

The spelling of 1388247224 in words is "one billion, three hundred eighty-eight million, two hundred forty-seven thousand, two hundred twenty-four".