1385921398920 has 64 divisors (see below), whose sum is σ = 4160480466240. Its totient is φ = 369337593600.

The previous prime is 1385921398837. The next prime is 1385921398969. The reversal of 1385921398920 is 298931295831.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3588111 + ... + 3955550.

It is an arithmetic number, because the mean of its divisors is an integer number (65007507285).

Almost surely, 2^{1385921398920} is an apocalyptic number.

1385921398920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385921398920 is an abundant number, since it is smaller than the sum of its proper divisors (2774559067320).

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

1385921398920 is a wasteful number, since it uses less digits than its factorization.

1385921398920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7545206 (or 7545202 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 60.

The spelling of 1385921398920 in words is "one trillion, three hundred eighty-five billion, nine hundred twenty-one million, three hundred ninety-eight thousand, nine hundred twenty".