1378396216 has 32 divisors (see below), whose sum is σ = 2681064000. Its totient is φ = 663578496.

The previous prime is 1378396207. The next prime is 1378396223. The reversal of 1378396216 is 6126938731.

It is a super-2 number, since 2×1378396216² = 3799952256566237312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77050 + ... + 93238.

It is an arithmetic number, because the mean of its divisors is an integer number (83783250).

Almost surely, 2^1378396216 is an apocalyptic number.

It is an amenable number.

1378396216 is a deficient number, since it is larger than the sum of its proper divisors (1302667784).

1378396216 is a wasteful number, since it uses less digits than its factorization.

1378396216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16591 (or 16587 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 1378396216 is about 37126.7587596871. The cubic root of 1378396216 is about 1112.9048218442.

The spelling of 1378396216 in words is "one billion, three hundred seventy-eight million, three hundred ninety-six thousand, two hundred sixteen".