1226995690 has 8 divisors (see below), whose sum is σ = 2208592260. Its totient is φ = 490798272.

The previous prime is 1226995687. The next prime is 1226995691. The reversal of 1226995690 is 965996221.

It can be written as a sum of positive squares in 2 ways, for example, as 1224230121 + 2765569 = 34989^2 + 1663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1226995690² = 3011036846557152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1226995691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61349775 + ... + 61349794.

Almost surely, 2^1226995690 is an apocalyptic number.

1226995690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1226995690 is a deficient number, since it is larger than the sum of its proper divisors (981596570).

1226995690 is a wasteful number, since it uses less digits than its factorization.

1226995690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122699576.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 1226995690 is about 35028.4982549923. The cubic root of 1226995690 is about 1070.5682165556.

The spelling of 1226995690 in words is "one billion, two hundred twenty-six million, nine hundred ninety-five thousand, six hundred ninety".