1388863542 has 32 divisors (see below), whose sum is σ = 3032801280. Its totient is φ = 420513120.

The previous prime is 1388863537. The next prime is 1388863543. The reversal of 1388863542 is 2453688831.

It is a junction number, because it is equal to n+sod(n) for n = 1388863491 and 1388863500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388863543) 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, 76188 + ... + 92640.

It is an arithmetic number, because the mean of its divisors is an integer number (94775040).

Almost surely, 2^1388863542 is an apocalyptic number.

1388863542 is an abundant number, since it is smaller than the sum of its proper divisors (1643937738).

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

1388863542 is a wasteful number, since it uses less digits than its factorization.

1388863542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17748.

The product of its digits is 1105920, while the sum is 48.

The square root of 1388863542 is about 37267.4595592455. The cubic root of 1388863542 is about 1115.7147962120.

The spelling of 1388863542 in words is "one billion, three hundred eighty-eight million, eight hundred sixty-three thousand, five hundred forty-two".