1378452836 has 12 divisors (see below), whose sum is σ = 2517174912. Its totient is φ = 659260008.

The previous prime is 1378452833. The next prime is 1378452847. The reversal of 1378452836 is 6382548731.

It is not an unprimeable number, because it can be changed into a prime (1378452833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7491500 + ... + 7491683.

It is an arithmetic number, because the mean of its divisors is an integer number (209764576).

Almost surely, 2^1378452836 is an apocalyptic number.

It is an amenable number.

1378452836 is a deficient number, since it is larger than the sum of its proper divisors (1138722076).

1378452836 is a wasteful number, since it uses less digits than its factorization.

1378452836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14983210 (or 14983208 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The square root of 1378452836 is about 37127.5212746555. The cubic root of 1378452836 is about 1112.9200597967.

The spelling of 1378452836 in words is "one billion, three hundred seventy-eight million, four hundred fifty-two thousand, eight hundred thirty-six".