1389401286 has 32 divisors (see below), whose sum is σ = 3420066048. Its totient is φ = 366435360.

The previous prime is 1389401269. The next prime is 1389401303. The reversal of 1389401286 is 6821049831.

It is an interprime number because it is at equal distance from previous prime (1389401269) and next prime (1389401303).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1271800 + ... + 1272891.

It is an arithmetic number, because the mean of its divisors is an integer number (106877064).

Almost surely, 2^1389401286 is an apocalyptic number.

1389401286 is an abundant number, since it is smaller than the sum of its proper divisors (2030664762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389401286 is a wasteful number, since it uses less digits than its factorization.

1389401286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544716.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1389401286 is about 37274.6735196970. The cubic root of 1389401286 is about 1115.8587728046.

The spelling of 1389401286 in words is "one billion, three hundred eighty-nine million, four hundred one thousand, two hundred eighty-six".