1388469500 has 48 divisors (see below), whose sum is σ = 3308104800. Its totient is φ = 504896000.

The previous prime is 1388469493. The next prime is 1388469503. The reversal of 1388469500 is 59648831.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388469503) 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, 120725 + ... + 131724.

It is an arithmetic number, because the mean of its divisors is an integer number (68918850).

Almost surely, 2^1388469500 is an apocalyptic number.

1388469500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388469500 is an abundant number, since it is smaller than the sum of its proper divisors (1919635300).

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

1388469500 is a wasteful number, since it uses less digits than its factorization.

1388469500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252479 (or 252467 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1388469500 is about 37262.1725077860. The cubic root of 1388469500 is about 1115.6092710685.

The spelling of 1388469500 in words is "one billion, three hundred eighty-eight million, four hundred sixty-nine thousand, five hundred".