1906398 has 24 divisors (see below), whose sum is σ = 4448808. Its totient is φ = 586512.

The previous prime is 1906393. The next prime is 1906417. The reversal of 1906398 is 8936091.

1906398 is a `hidden beast` number, since 19 + 0 + 639 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3840 + ... + 4307.

It is an arithmetic number, because the mean of its divisors is an integer number (185367).

2^1906398 is an apocalyptic number.

1906398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1906398 is an abundant number, since it is smaller than the sum of its proper divisors (2542410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1906398 is a wasteful number, since it uses less digits than its factorization.

1906398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168 (or 8165 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1906398 is about 1380.7237232698. The cubic root of 1906398 is about 123.9951003961.

It can be divided in two parts, 1906 and 398, that added together give a square (2304 = 48²).

The spelling of 1906398 in words is "one million, nine hundred six thousand, three hundred ninety-eight".