1390498 has 8 divisors (see below), whose sum is σ = 2208492. Its totient is φ = 654336.

The previous prime is 1390489. The next prime is 1390507. The reversal of 1390498 is 8940931.

It is an interprime number because it is at equal distance from previous prime (1390489) and next prime (1390507).

It can be written as a sum of positive squares in 2 ways, for example, as 1216609 + 173889 = 1103^2 + 417^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 40897 = 1390498 / (1 + 3 + 9 + 0 + 4 + 9 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20415 + ... + 20482.

2^1390498 is an apocalyptic number.

1390498 is a deficient number, since it is larger than the sum of its proper divisors (817994).

1390498 is a wasteful number, since it uses less digits than its factorization.

1390498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40916.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1390498 is about 1179.1937923853. The cubic root of 1390498 is about 111.6152293978.

The spelling of 1390498 in words is "one million, three hundred ninety thousand, four hundred ninety-eight".