1378804836 has 12 divisors (see below), whose sum is σ = 3217211312. Its totient is φ = 459601608.

The previous prime is 1378804829. The next prime is 1378804841. The reversal of 1378804836 is 6384088731.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1378804836² = 3802205551553973792, which contains 22 as substring.

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, 57450190 + ... + 57450213.

Almost surely, 2^1378804836 is an apocalyptic number.

It is an amenable number.

1378804836 is an abundant number, since it is smaller than the sum of its proper divisors (1838406476).

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

1378804836 is a wasteful number, since it uses less digits than its factorization.

1378804836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114900410 (or 114900408 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 1378804836 is about 37132.2613908714. The cubic root of 1378804836 is about 1113.0147830280.

The spelling of 1378804836 in words is "one billion, three hundred seventy-eight million, eight hundred four thousand, eight hundred thirty-six".