1380998 has 8 divisors (see below), whose sum is σ = 2088192. Its totient is φ = 684936.

The previous prime is 1380997. The next prime is 1381027. The reversal of 1380998 is 8990831.

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

It is a super-3 number, since 3×1380998³ = 7901333694151715976, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380997) 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, 2465 + ... + 2972.

It is an arithmetic number, because the mean of its divisors is an integer number (261024).

2^1380998 is an apocalyptic number.

1380998 is a deficient number, since it is larger than the sum of its proper divisors (707194).

1380998 is a wasteful number, since it uses less digits than its factorization.

1380998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5566.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1380998 is about 1175.1587126852. The cubic root of 1380998 is about 111.3604600813.

The spelling of 1380998 in words is "one million, three hundred eighty thousand, nine hundred ninety-eight".