1388614390 has 8 divisors (see below), whose sum is σ = 2499505920. Its totient is φ = 555445752.

The previous prime is 1388614369. The next prime is 1388614391. The reversal of 1388614390 is 934168831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388614391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69430710 + ... + 69430729.

It is an arithmetic number, because the mean of its divisors is an integer number (312438240).

Almost surely, 2^1388614390 is an apocalyptic number.

1388614390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388614390 is a deficient number, since it is larger than the sum of its proper divisors (1110891530).

1388614390 is a wasteful number, since it uses less digits than its factorization.

1388614390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138861446.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1388614390 is about 37264.1166539608. The cubic root of 1388614390 is about 1115.6480751870.

The spelling of 1388614390 in words is "one billion, three hundred eighty-eight million, six hundred fourteen thousand, three hundred ninety".