1388553357 has 8 divisors (see below), whose sum is σ = 1865982976. Its totient is φ = 918412992.

The previous prime is 1388553349. The next prime is 1388553371. The reversal of 1388553357 is 7533558831.

It is a happy number.

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

It is not a de Polignac number, because 1388553357 - 2³ = 1388553349 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 (1388553857) 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, 1821868 + ... + 1822629.

It is an arithmetic number, because the mean of its divisors is an integer number (233247872).

Almost surely, 2^1388553357 is an apocalyptic number.

It is an amenable number.

1388553357 is a deficient number, since it is larger than the sum of its proper divisors (477429619).

1388553357 is a wasteful number, since it uses less digits than its factorization.

1388553357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644627.

The product of its digits is 1512000, while the sum is 48.

The square root of 1388553357 is about 37263.2977204112. The cubic root of 1388553357 is about 1115.6317297933.

The spelling of 1388553357 in words is "one billion, three hundred eighty-eight million, five hundred fifty-three thousand, three hundred fifty-seven".