1226920660 has 48 divisors (see below), whose sum is σ = 2948448384. Its totient is φ = 420110208.

The previous prime is 1226920657. The next prime is 1226920663. The reversal of 1226920660 is 660296221.

It is an interprime number because it is at equal distance from previous prime (1226920657) and next prime (1226920663).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226920663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110482 + ... + 121078.

It is an arithmetic number, because the mean of its divisors is an integer number (61426008).

Almost surely, 2^1226920660 is an apocalyptic number.

1226920660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226920660 is an abundant number, since it is smaller than the sum of its proper divisors (1721527724).

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

1226920660 is a wasteful number, since it uses less digits than its factorization.

1226920660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11440 (or 11438 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1226920660 is about 35027.4272535109. The cubic root of 1226920660 is about 1070.5463945907.

The spelling of 1226920660 in words is "one billion, two hundred twenty-six million, nine hundred twenty thousand, six hundred sixty".