1213933826 has 16 divisors (see below), whose sum is σ = 2190557760. Its totient is φ = 492875280.

The previous prime is 1213933759. The next prime is 1213933871. The reversal of 1213933826 is 6283393121.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 1213933826.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2281565 + ... + 2282096.

It is an arithmetic number, because the mean of its divisors is an integer number (136909860).

Almost surely, 2^1213933826 is an apocalyptic number.

1213933826 is a deficient number, since it is larger than the sum of its proper divisors (976623934).

1213933826 is a wasteful number, since it uses less digits than its factorization.

1213933826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563689.

The product of its digits is 46656, while the sum is 38.

The square root of 1213933826 is about 34841.5531513737. The cubic root of 1213933826 is about 1066.7557792521.

The spelling of 1213933826 in words is "one billion, two hundred thirteen million, nine hundred thirty-three thousand, eight hundred twenty-six".