1670398 has 8 divisors (see below), whose sum is σ = 2614608. Its totient is φ = 798864.

The previous prime is 1670359. The next prime is 1670399. The reversal of 1670398 is 8930761.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670399) 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, 18111 + ... + 18202.

It is an arithmetic number, because the mean of its divisors is an integer number (326826).

2^1670398 is an apocalyptic number.

1670398 is a deficient number, since it is larger than the sum of its proper divisors (944210).

1670398 is a wasteful number, since it uses less digits than its factorization.

1670398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36338.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1670398 is about 1292.4387799815. The cubic root of 1670398 is about 118.6515238992.

The spelling of 1670398 in words is "one million, six hundred seventy thousand, three hundred ninety-eight".