1212680690 has 64 divisors (see below), whose sum is σ = 2404684800. Its totient is φ = 437577984.

The previous prime is 1212680629. The next prime is 1212680743. The reversal of 1212680690 is 960862121.

It is a super-2 number, since 2×1212680690² = 2941188911797752200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212680690.

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 31 ways as a sum of consecutive naturals, for example, 1710056 + ... + 1710764.

It is an arithmetic number, because the mean of its divisors is an integer number (37573200).

Almost surely, 2^1212680690 is an apocalyptic number.

1212680690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212680690 is a deficient number, since it is larger than the sum of its proper divisors (1192004110).

1212680690 is a wasteful number, since it uses less digits than its factorization.

1212680690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1212680690 is about 34823.5651534991. The cubic root of 1212680690 is about 1066.3885845193.

The spelling of 1212680690 in words is "one billion, two hundred twelve million, six hundred eighty thousand, six hundred ninety".