1998495 has 24 divisors (see below), whose sum is σ = 3510000. Its totient is φ = 1051776.

The previous prime is 1998473. The next prime is 1998497. The reversal of 1998495 is 5948991.

It is not a de Polignac number, because 1998495 - 2⁶ = 1998431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1998495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3756 + ... + 4254.

It is an arithmetic number, because the mean of its divisors is an integer number (146250).

2^1998495 is an apocalyptic number.

1998495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1998495 is a deficient number, since it is larger than the sum of its proper divisors (1511505).

1998495 is a wasteful number, since it uses less digits than its factorization.

1998495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 596 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 1998495 is about 1413.6813643817. The cubic root of 1998495 is about 125.9604940394.

The spelling of 1998495 in words is "one million, nine hundred ninety-eight thousand, four hundred ninety-five".