1388520454 has 8 divisors (see below), whose sum is σ = 2091079368. Its totient is φ = 691494000.

The previous prime is 1388520433. The next prime is 1388520457. The reversal of 1388520454 is 4540258831.

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

It is a super-2 number, since 2×1388520454² = 3855978102352732232, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1382487 + ... + 1383490.

It is an arithmetic number, because the mean of its divisors is an integer number (261384921).

Almost surely, 2^1388520454 is an apocalyptic number.

1388520454 is a deficient number, since it is larger than the sum of its proper divisors (702558914).

1388520454 is a wasteful number, since it uses less digits than its factorization.

1388520454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766230.

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 1388520454 is about 37262.8562243959. The cubic root of 1388520454 is about 1115.6229177635.

The spelling of 1388520454 in words is "one billion, three hundred eighty-eight million, five hundred twenty thousand, four hundred fifty-four".