1379890 has 16 divisors (see below), whose sum is σ = 2630232. Its totient is φ = 519424.

The previous prime is 1379887. The next prime is 1379897. The reversal of 1379890 is 989731.

It can be written as a sum of positive squares in 4 ways, for example, as 1371241 + 8649 = 1171^2 + 93^2 .

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (1379897) 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, 3889 + ... + 4228.

2^1379890 is an apocalyptic number.

1379890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1379890 is a deficient number, since it is larger than the sum of its proper divisors (1250342).

1379890 is a wasteful number, since it uses less digits than its factorization.

1379890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8141.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1379890 is about 1174.6871924049. The cubic root of 1379890 is about 111.3306699336.

The spelling of 1379890 in words is "one million, three hundred seventy-nine thousand, eight hundred ninety".