1385490890 has 16 divisors (see below), whose sum is σ = 2850152832. Its totient is φ = 475025424.

The previous prime is 1385490851. The next prime is 1385490893. The reversal of 1385490890 is 980945831.

It is not an unprimeable number, because it can be changed into a prime (1385490893) 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, 9896294 + ... + 9896433.

It is an arithmetic number, because the mean of its divisors is an integer number (178134552).

Almost surely, 2^1385490890 is an apocalyptic number.

1385490890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1385490890 is an abundant number, since it is smaller than the sum of its proper divisors (1464661942).

1385490890 is a wasteful number, since it uses less digits than its factorization.

1385490890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19792741.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1385490890 is about 37222.1827678066. The cubic root of 1385490890 is about 1114.8109474562.

The spelling of 1385490890 in words is "one billion, three hundred eighty-five million, four hundred ninety thousand, eight hundred ninety".