1229071640 has 16 divisors (see below), whose sum is σ = 2765411280. Its totient is φ = 491628640.

The previous prime is 1229071633. The next prime is 1229071673. The reversal of 1229071640 is 461709221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1229071597 and 1229071606.

It is a congruent number.

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, 15363356 + ... + 15363435.

It is an arithmetic number, because the mean of its divisors is an integer number (172838205).

Almost surely, 2^1229071640 is an apocalyptic number.

1229071640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1229071640 is an abundant number, since it is smaller than the sum of its proper divisors (1536339640).

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

1229071640 is a wasteful number, since it uses less digits than its factorization.

1229071640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30726802 (or 30726798 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1229071640 is about 35058.1180327752. The cubic root of 1229071640 is about 1071.1716399963.

The spelling of 1229071640 in words is "one billion, two hundred twenty-nine million, seventy-one thousand, six hundred forty".