1385604890 has 64 divisors (see below), whose sum is σ = 2696716800. Its totient is φ = 510698496.

The previous prime is 1385604863. The next prime is 1385604901. The reversal of 1385604890 is 984065831.

It is a super-2 number, since 2×1385604890² = 3839801822383824200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2721956 + ... + 2722464.

It is an arithmetic number, because the mean of its divisors is an integer number (42136200).

Almost surely, 2^1385604890 is an apocalyptic number.

1385604890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1385604890 is a deficient number, since it is larger than the sum of its proper divisors (1311111910).

1385604890 is a wasteful number, since it uses less digits than its factorization.

1385604890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1385604890 is about 37223.7140812144. The cubic root of 1385604890 is about 1114.8415226512.

The spelling of 1385604890 in words is "one billion, three hundred eighty-five million, six hundred four thousand, eight hundred ninety".