1378890 has 32 divisors (see below), whose sum is σ = 3677760. Its totient is φ = 367632.

The previous prime is 1378859. The next prime is 1378903. The reversal of 1378890 is 988731.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2284 + ... + 2823.

It is an arithmetic number, because the mean of its divisors is an integer number (114930).

2^1378890 is an apocalyptic number.

1378890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378890 is an abundant number, since it is smaller than the sum of its proper divisors (2298870).

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

1378890 is a wasteful number, since it uses less digits than its factorization.

1378890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123 (or 5117 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1378890 is about 1174.2614700313. The cubic root of 1378890 is about 111.3037698246.

The spelling of 1378890 in words is "one million, three hundred seventy-eight thousand, eight hundred ninety".