1378820244 has 24 divisors (see below), whose sum is σ = 3304200928. Its totient is φ = 447184800.

The previous prime is 1378820231. The next prime is 1378820257. The reversal of 1378820244 is 4420288731.

It is an interprime number because it is at equal distance from previous prime (1378820231) and next prime (1378820257).

It is a super-2 number, since 2×1378820244² = 3802290530528439072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1552282 + ... + 1553169.

Almost surely, 2^1378820244 is an apocalyptic number.

It is an amenable number.

1378820244 is an abundant number, since it is smaller than the sum of its proper divisors (1925380684).

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

1378820244 is a wasteful number, since it uses less digits than its factorization.

1378820244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105495 (or 3105493 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 1378820244 is about 37132.4688648627. The cubic root of 1378820244 is about 1113.0189289538.

The spelling of 1378820244 in words is "one billion, three hundred seventy-eight million, eight hundred twenty thousand, two hundred forty-four".