1389450240 has 528 divisors, whose sum is σ = 5433556800. Its totient is φ = 335757312.

The previous prime is 1389450199. The next prime is 1389450247. The reversal of 1389450240 is 420549831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1389450195 and 1389450204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389450247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60410869 + ... + 60410891.

Almost surely, 2^1389450240 is an apocalyptic number.

1389450240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389450240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2716778400).

1389450240 is an abundant number, since it is smaller than the sum of its proper divisors (4044106560).

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

1389450240 is a wasteful number, since it uses less digits than its factorization.

1389450240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1389450240 is about 37275.3301796242. The cubic root of 1389450240 is about 1115.8718779959.

1389450240 divided by its product of nonzero digits (34560) gives a palindrome (40204).

It can be divided in two parts, 138 and 9450240, that added together give a triangular number (9450378 = T₄₃₄₇).

The spelling of 1389450240 in words is "one billion, three hundred eighty-nine million, four hundred fifty thousand, two hundred forty".