1205630379 has 32 divisors (see below), whose sum is σ = 1864296000. Its totient is φ = 769317120.

The previous prime is 1205630359. The next prime is 1205630381. The reversal of 1205630379 is 9730365021.

1205630379 is a `hidden beast` number, since 1 + 20 + 563 + 0 + 3 + 79 = 666.

It is not a de Polignac number, because 1205630379 - 2²⁷ = 1071412651 is a prime.

It is a super-2 number, since 2×1205630379² = 2907089221535367282, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1205630329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48397 + ... + 68945.

It is an arithmetic number, because the mean of its divisors is an integer number (58259250).

Almost surely, 2^1205630379 is an apocalyptic number.

1205630379 is a deficient number, since it is larger than the sum of its proper divisors (658665621).

1205630379 is a wasteful number, since it uses less digits than its factorization.

1205630379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20652 (or 20646 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 1205630379 is about 34722.1885686948. The cubic root of 1205630379 is about 1064.3179683950.

The spelling of 1205630379 in words is "one billion, two hundred five million, six hundred thirty thousand, three hundred seventy-nine".