1216387622 has 8 divisors (see below), whose sum is σ = 1824733872. Its totient is φ = 608143000.

The previous prime is 1216387609. The next prime is 1216387633. The reversal of 1216387622 is 2267836121.

It is a happy number.

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

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, 22847 + ... + 54357.

It is an arithmetic number, because the mean of its divisors is an integer number (228091734).

Almost surely, 2^1216387622 is an apocalyptic number.

1216387622 is a deficient number, since it is larger than the sum of its proper divisors (608346250).

1216387622 is a wasteful number, since it uses less digits than its factorization.

1216387622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50814.

The product of its digits is 48384, while the sum is 38.

The square root of 1216387622 is about 34876.7490170744. The cubic root of 1216387622 is about 1067.4740609470.

The spelling of 1216387622 in words is "one billion, two hundred sixteen million, three hundred eighty-seven thousand, six hundred twenty-two".