1388453512 has 32 divisors (see below), whose sum is σ = 2876342400. Its totient is φ = 624980224.

The previous prime is 1388453509. The next prime is 1388453567. The reversal of 1388453512 is 2153548831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218812 + ... + 225067.

It is an arithmetic number, because the mean of its divisors is an integer number (89885700).

Almost surely, 2^1388453512 is an apocalyptic number.

It is an amenable number.

1388453512 is an abundant number, since it is smaller than the sum of its proper divisors (1487888888).

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

1388453512 is a wasteful number, since it uses less digits than its factorization.

1388453512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443925 (or 443921 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 1388453512 is about 37261.9579732467. The cubic root of 1388453512 is about 1115.6049890324.

The spelling of 1388453512 in words is "one billion, three hundred eighty-eight million, four hundred fifty-three thousand, five hundred twelve".