1226220740 has 12 divisors (see below), whose sum is σ = 2575063596. Its totient is φ = 490488288.

The previous prime is 1226220733. The next prime is 1226220797. The reversal of 1226220740 is 470226221.

It can be written as a sum of positive squares in 2 ways, for example, as 615933124 + 610287616 = 24818^2 + 24704^2 .

It is a super-2 number, since 2×1226220740² = 3007234606412295200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30655499 + ... + 30655538.

It is an arithmetic number, because the mean of its divisors is an integer number (214588633).

Almost surely, 2^1226220740 is an apocalyptic number.

1226220740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226220740 is an abundant number, since it is smaller than the sum of its proper divisors (1348842856).

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

1226220740 is a wasteful number, since it uses less digits than its factorization.

1226220740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61311046 (or 61311044 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 1226220740 is about 35017.4348003962. The cubic root of 1226220740 is about 1070.3427847498.

Adding to 1226220740 its reverse (470226221), we get a palindrome (1696446961).

The spelling of 1226220740 in words is "one billion, two hundred twenty-six million, two hundred twenty thousand, seven hundred forty".