1205263650 has 96 divisors (see below), whose sum is σ = 3038787648. Its totient is φ = 316108800.

The previous prime is 1205263643. The next prime is 1205263669. The reversal of 1205263650 is 563625021.

It is a super-2 number, since 2×1205263650² = 2905320932022645000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 47 ways as a sum of consecutive naturals, for example, 3576282 + ... + 3576618.

It is an arithmetic number, because the mean of its divisors is an integer number (31654038).

Almost surely, 2^1205263650 is an apocalyptic number.

1205263650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1205263650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519393824).

1205263650 is an abundant number, since it is smaller than the sum of its proper divisors (1833523998).

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

1205263650 is a wasteful number, since it uses less digits than its factorization.

1205263650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1205263650 is about 34716.9072643287. The cubic root of 1205263650 is about 1064.2100426013.

Adding to 1205263650 its reverse (563625021), we get a palindrome (1768888671).

The spelling of 1205263650 in words is "one billion, two hundred five million, two hundred sixty-three thousand, six hundred fifty".