1957998 has 16 divisors (see below), whose sum is σ = 4475520. Its totient is φ = 559416.

The previous prime is 1957997. The next prime is 1957999. The reversal of 1957998 is 8997591.

It is an interprime number because it is at equal distance from previous prime (1957997) and next prime (1957999).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23268 + ... + 23351.

It is an arithmetic number, because the mean of its divisors is an integer number (279720).

2^1957998 is an apocalyptic number.

1957998 is an abundant number, since it is smaller than the sum of its proper divisors (2517522).

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

1957998 is a wasteful number, since it uses less digits than its factorization.

1957998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46631.

The product of its digits is 204120, while the sum is 48.

The square root of 1957998 is about 1399.2848173263. The cubic root of 1957998 is about 125.1038709960.

The spelling of 1957998 in words is "one million, nine hundred fifty-seven thousand, nine hundred ninety-eight".