1388289073 has 16 divisors (see below), whose sum is σ = 1457280000. Its totient is φ = 1320846912.

The previous prime is 1388289047. The next prime is 1388289079. The reversal of 1388289073 is 3709828831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1388289073 is a prime.

It is a super-2 number, since 2×1388289073² = 3854693100422398658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388289079) 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 15 ways as a sum of consecutive naturals, for example, 627936 + ... + 630142.

It is an arithmetic number, because the mean of its divisors is an integer number (91080000).

Almost surely, 2^1388289073 is an apocalyptic number.

It is an amenable number.

1388289073 is a deficient number, since it is larger than the sum of its proper divisors (68990927).

1388289073 is a wasteful number, since it uses less digits than its factorization.

1388289073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 1388289073 is about 37259.7513813498. The cubic root of 1388289073 is about 1115.5609457353.

The spelling of 1388289073 in words is "one billion, three hundred eighty-eight million, two hundred eighty-nine thousand, seventy-three".