1388774239 has 8 divisors (see below), whose sum is σ = 1509025280. Its totient is φ = 1273239000.

The previous prime is 1388774213. The next prime is 1388774249. The reversal of 1388774239 is 9324778831.

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

It is a cyclic number.

It is not a de Polignac number, because 1388774239 - 2⁵ = 1388774207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388774249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178337 + ... + 1179514.

It is an arithmetic number, because the mean of its divisors is an integer number (188628160).

Almost surely, 2^1388774239 is an apocalyptic number.

1388774239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1388774239 is a deficient number, since it is larger than the sum of its proper divisors (120251041).

1388774239 is a wasteful number, since it uses less digits than its factorization.

1388774239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357901.

The product of its digits is 2032128, while the sum is 52.

The square root of 1388774239 is about 37266.2614035806. The cubic root of 1388774239 is about 1115.6908824602.

The spelling of 1388774239 in words is "one billion, three hundred eighty-eight million, seven hundred seventy-four thousand, two hundred thirty-nine".