1378090 has 16 divisors (see below), whose sum is σ = 2835072. Its totient is φ = 472464.

The previous prime is 1378081. The next prime is 1378099. The reversal of 1378090 is 908731.

It is an interprime number because it is at equal distance from previous prime (1378081) and next prime (1378099).

It is not an unprimeable number, because it can be changed into a prime (1378099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9774 + ... + 9913.

It is an arithmetic number, because the mean of its divisors is an integer number (177192).

2^1378090 is an apocalyptic number.

1378090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378090 is an abundant number, since it is smaller than the sum of its proper divisors (1456982).

1378090 is a wasteful number, since it uses less digits than its factorization.

1378090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19701.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1378090 is about 1173.9207809729. The cubic root of 1378090 is about 111.2822403717.

The spelling of 1378090 in words is "one million, three hundred seventy-eight thousand, ninety".