1205063890 has 16 divisors (see below), whose sum is σ = 2182425408. Its totient is φ = 479067696.

The previous prime is 1205063869. The next prime is 1205063911. The reversal of 1205063890 is 983605021.

It is an interprime number because it is at equal distance from previous prime (1205063869) and next prime (1205063911).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368022 + ... + 371281.

It is an arithmetic number, because the mean of its divisors is an integer number (136401588).

Almost surely, 2^1205063890 is an apocalyptic number.

1205063890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1205063890 is a deficient number, since it is larger than the sum of its proper divisors (977361518).

1205063890 is a wasteful number, since it uses less digits than its factorization.

1205063890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739473.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1205063890 is about 34714.0301607290. The cubic root of 1205063890 is about 1064.1512454123.

The spelling of 1205063890 in words is "one billion, two hundred five million, sixty-three thousand, eight hundred ninety".