1378788 has 24 divisors (see below), whose sum is σ = 3255840. Its totient is φ = 454080.

The previous prime is 1378777. The next prime is 1378799. The reversal of 1378788 is 8878731.

It is an interprime number because it is at equal distance from previous prime (1378777) and next prime (1378799).

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, 423 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (135660).

2^1378788 is an apocalyptic number.

It is an amenable number.

1378788 is an abundant number, since it is smaller than the sum of its proper divisors (1877052).

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

1378788 is a wasteful number, since it uses less digits than its factorization.

1378788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387 (or 1385 counting only the distinct ones).

The product of its digits is 75264, while the sum is 42.

The square root of 1378788 is about 1174.2180376744. The cubic root of 1378788 is about 111.3010252826.

The spelling of 1378788 in words is "one million, three hundred seventy-eight thousand, seven hundred eighty-eight".