1229616388 has 144 divisors (see below), whose sum is σ = 3096878400. Its totient is φ = 418763520.

The previous prime is 1229616371. The next prime is 1229616403. The reversal of 1229616388 is 8836169221.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 531378 + ... + 533686.

It is an arithmetic number, because the mean of its divisors is an integer number (21506100).

Almost surely, 2^1229616388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1229616388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548439200).

1229616388 is an abundant number, since it is smaller than the sum of its proper divisors (1867262012).

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

1229616388 is a wasteful number, since it uses less digits than its factorization.

1229616388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370 (or 2361 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 1229616388 is about 35065.8863854887. The cubic root of 1229616388 is about 1071.3298711907.

The spelling of 1229616388 in words is "one billion, two hundred twenty-nine million, six hundred sixteen thousand, three hundred eighty-eight".