1389378490290 has 96 divisors (see below), whose sum is σ = 4143027597696. Its totient is φ = 316450022400.

The previous prime is 1389378490267. The next prime is 1389378490303. The reversal of 1389378490290 is 920948739831.

1389378490290 is a `hidden beast` number, since 1 + 38 + 93 + 7 + 8 + 490 + 29 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3718111 + ... + 4074690.

It is an arithmetic number, because the mean of its divisors is an integer number (43156537476).

Almost surely, 2^{1389378490290} is an apocalyptic number.

1389378490290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389378490290 is an abundant number, since it is smaller than the sum of its proper divisors (2753649107406).

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

1389378490290 is a wasteful number, since it uses less digits than its factorization.

1389378490290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7793104 (or 7793101 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 1389378490290 in words is "one trillion, three hundred eighty-nine billion, three hundred seventy-eight million, four hundred ninety thousand, two hundred ninety".