1378490 has 8 divisors (see below), whose sum is σ = 2481300. Its totient is φ = 551392.

The previous prime is 1378441. The next prime is 1378499. The reversal of 1378490 is 948731.

It can be written as a sum of positive squares in 2 ways, for example, as 1352569 + 25921 = 1163^2 + 161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1378499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68915 + ... + 68934.

2^1378490 is an apocalyptic number.

1378490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378490 is a deficient number, since it is larger than the sum of its proper divisors (1102810).

1378490 is a wasteful number, since it uses less digits than its factorization.

1378490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137856.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1378490 is about 1174.0911378594. The cubic root of 1378490 is about 111.2930061394.

The spelling of 1378490 in words is "one million, three hundred seventy-eight thousand, four hundred ninety".