1385641740 has 192 divisors, whose sum is σ = 4613833728. Its totient is φ = 304128000.

The previous prime is 1385641723. The next prime is 1385641753. The reversal of 1385641740 is 471465831.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1153140 + ... + 1154340.

It is an arithmetic number, because the mean of its divisors is an integer number (24030384).

Almost surely, 2^1385641740 is an apocalyptic number.

1385641740 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 1385641740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2306916864).

1385641740 is an abundant number, since it is smaller than the sum of its proper divisors (3228191988).

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

1385641740 is a wasteful number, since it uses less digits than its factorization.

1385641740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1385641740 is about 37224.2090580848. The cubic root of 1385641740 is about 1114.8514055902.

The spelling of 1385641740 in words is "one billion, three hundred eighty-five million, six hundred forty-one thousand, seven hundred forty".