1385959940 has 24 divisors (see below), whose sum is σ = 3063701760. Its totient is φ = 525205728.

The previous prime is 1385959903. The next prime is 1385959943. The reversal of 1385959940 is 499595831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1385959943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1823252 + ... + 1824011.

It is an arithmetic number, because the mean of its divisors is an integer number (127654240).

Almost surely, 2^1385959940 is an apocalyptic number.

1385959940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385959940 is an abundant number, since it is smaller than the sum of its proper divisors (1677741820).

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

1385959940 is a wasteful number, since it uses less digits than its factorization.

1385959940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3647291 (or 3647289 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 53.

The square root of 1385959940 is about 37228.4829129526. The cubic root of 1385959940 is about 1114.9367375477.

The spelling of 1385959940 in words is "one billion, three hundred eighty-five million, nine hundred fifty-nine thousand, nine hundred forty".