1213955296 has 48 divisors (see below), whose sum is σ = 2519717760. Its totient is φ = 574128000.

The previous prime is 1213955287. The next prime is 1213955297. The reversal of 1213955296 is 6925593121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213955297) 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, 538171 + ... + 540421.

It is an arithmetic number, because the mean of its divisors is an integer number (52494120).

Almost surely, 2^1213955296 is an apocalyptic number.

1213955296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213955296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259858880).

1213955296 is an abundant number, since it is smaller than the sum of its proper divisors (1305762464).

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

1213955296 is a wasteful number, since it uses less digits than its factorization.

1213955296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167 (or 3159 counting only the distinct ones).

The product of its digits is 145800, while the sum is 43.

The square root of 1213955296 is about 34841.8612591233. The cubic root of 1213955296 is about 1066.7620682032.

The spelling of 1213955296 in words is "one billion, two hundred thirteen million, nine hundred fifty-five thousand, two hundred ninety-six".