1388401147 has 8 divisors (see below), whose sum is σ = 1590704352. Its totient is φ = 1187088000.

The previous prime is 1388401127. The next prime is 1388401159. The reversal of 1388401147 is 7411048831.

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

It is not a de Polignac number, because 1388401147 - 2¹⁹ = 1387876859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388401127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244504 + ... + 250117.

It is an arithmetic number, because the mean of its divisors is an integer number (198838044).

Almost surely, 2^1388401147 is an apocalyptic number.

1388401147 is a deficient number, since it is larger than the sum of its proper divisors (202303205).

1388401147 is an equidigital number, since it uses as much as digits as its factorization.

1388401147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495029.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 1388401147 is about 37261.2553062830. The cubic root of 1388401147 is about 1115.5909639824.

Adding to 1388401147 its reverse (7411048831), we get a palindrome (8799449978).

The spelling of 1388401147 in words is "one billion, three hundred eighty-eight million, four hundred one thousand, one hundred forty-seven".