1396217680 has 240 divisors, whose sum is σ = 3971745792. Its totient is φ = 449971200.

The previous prime is 1396217677. The next prime is 1396217687. The reversal of 1396217680 is 867126931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396217687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10993777 + ... + 10993903.

Almost surely, 2^1396217680 is an apocalyptic number.

1396217680 is a gapful number since it is divisible by the number (10) 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 1396217680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1985872896).

1396217680 is an abundant number, since it is smaller than the sum of its proper divisors (2575528112).

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

1396217680 is a wasteful number, since it uses less digits than its factorization.

1396217680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1396217680 is about 37365.9963068028. The cubic root of 1396217680 is about 1117.6805954762.

The spelling of 1396217680 in words is "one billion, three hundred ninety-six million, two hundred seventeen thousand, six hundred eighty".