1392217216 has 64 divisors (see below), whose sum is σ = 3016278720. Its totient is φ = 636244992.

The previous prime is 1392217207. The next prime is 1392217217. The reversal of 1392217216 is 6127122931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (1392217217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167331 + ... + 175453.

It is an arithmetic number, because the mean of its divisors is an integer number (47129355).

Almost surely, 2^1392217216 is an apocalyptic number.

1392217216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392217216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1508139360).

1392217216 is an abundant number, since it is smaller than the sum of its proper divisors (1624061504).

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

1392217216 is a wasteful number, since it uses less digits than its factorization.

1392217216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8253 (or 8241 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 1392217216 is about 37312.4270987563. The cubic root of 1392217216 is about 1116.6121092327.

The spelling of 1392217216 in words is "one billion, three hundred ninety-two million, two hundred seventeen thousand, two hundred sixteen".