1389290737428 has 72 divisors (see below), whose sum is σ = 3832368059520. Its totient is φ = 420855039360.

The previous prime is 1389290737427. The next prime is 1389290737447. The reversal of 1389290737428 is 8247370929831.

1389290737428 is a `hidden beast` number, since 1 + 3 + 8 + 92 + 90 + 7 + 37 + 428 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389290737423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 584901 + ... + 1766547.

It is an arithmetic number, because the mean of its divisors is an integer number (53227334160).

Almost surely, 2^{1389290737428} is an apocalyptic number.

1389290737428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1389290737428 is an abundant number, since it is smaller than the sum of its proper divisors (2443077322092).

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

1389290737428 is a wasteful number, since it uses less digits than its factorization.

1389290737428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184637 (or 1184632 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 1389290737428 in words is "one trillion, three hundred eighty-nine billion, two hundred ninety million, seven hundred thirty-seven thousand, four hundred twenty-eight".