1388520453 has 8 divisors (see below), whose sum is σ = 1852306848. Its totient is φ = 925207184.

The previous prime is 1388520433. The next prime is 1388520457. The reversal of 1388520453 is 3540258831.

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 1388520453 - 2¹³ = 1388512261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388520457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111375 + ... + 123212.

It is an arithmetic number, because the mean of its divisors is an integer number (231538356).

Almost surely, 2^1388520453 is an apocalyptic number.

It is an amenable number.

1388520453 is a deficient number, since it is larger than the sum of its proper divisors (463786395).

1388520453 is a wasteful number, since it uses less digits than its factorization.

1388520453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236563.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 1388520453 is about 37262.8562109777. The cubic root of 1388520453 is about 1115.6229174957.

The spelling of 1388520453 in words is "one billion, three hundred eighty-eight million, five hundred twenty thousand, four hundred fifty-three".