1378086814 has 32 divisors (see below), whose sum is σ = 2366812224. Its totient is φ = 596893440.

The previous prime is 1378086781. The next prime is 1378086817. The reversal of 1378086814 is 4186808731.

It is a Harshad number since it is a multiple of its sum of digits (46).

1378086814 is a modest number, since divided by 86814 gives 1378 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378086817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9954 + ... + 53434.

It is an arithmetic number, because the mean of its divisors is an integer number (73962882).

Almost surely, 2^1378086814 is an apocalyptic number.

1378086814 is a deficient number, since it is larger than the sum of its proper divisors (988725410).

1378086814 is a wasteful number, since it uses less digits than its factorization.

1378086814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43572.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 1378086814 is about 37122.5916929301. The cubic root of 1378086814 is about 1112.8215461405.

The spelling of 1378086814 in words is "one billion, three hundred seventy-eight million, eighty-six thousand, eight hundred fourteen".