1388960427 has 8 divisors (see below), whose sum is σ = 1902000016. Its totient is φ = 900947232.

The previous prime is 1388960393. The next prime is 1388960431. The reversal of 1388960427 is 7240698831.

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

It is not a de Polignac number, because 1388960427 - 2¹⁴ = 1388944043 is a prime.

It is a super-2 number, since 2×1388960427² = 3858422135544044658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388960467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6256468 + ... + 6256689.

It is an arithmetic number, because the mean of its divisors is an integer number (237750002).

Almost surely, 2^1388960427 is an apocalyptic number.

1388960427 is a deficient number, since it is larger than the sum of its proper divisors (513039589).

1388960427 is a wasteful number, since it uses less digits than its factorization.

1388960427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12513197.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1388960427 is about 37268.7593971144. The cubic root of 1388960427 is about 1115.7407391289.

The spelling of 1388960427 in words is "one billion, three hundred eighty-eight million, nine hundred sixty thousand, four hundred twenty-seven".