1920398 has 4 divisors (see below), whose sum is σ = 2880600. Its totient is φ = 960198.

The previous prime is 1920397. The next prime is 1920403. The reversal of 1920398 is 8930291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8930291 = 151 ⋅59141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480098 + ... + 480101.

It is an arithmetic number, because the mean of its divisors is an integer number (720150).

2^1920398 is an apocalyptic number.

1920398 is a deficient number, since it is larger than the sum of its proper divisors (960202).

1920398 is an equidigital number, since it uses as much as digits as its factorization.

1920398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960201.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1920398 is about 1385.7842544927. The cubic root of 1920398 is about 124.2978876902.

The spelling of 1920398 in words is "one million, nine hundred twenty thousand, three hundred ninety-eight".