1998477 has 48 divisors (see below), whose sum is σ = 3494400. Its totient is φ = 1088640.

The previous prime is 1998473. The next prime is 1998497. The reversal of 1998477 is 7748991.

It is not a de Polignac number, because 1998477 - 2² = 1998473 is a prime.

Its product of digits (127008) is a multiple of the sum of its prime factors (98).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998473) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64452 + ... + 64482.

It is an arithmetic number, because the mean of its divisors is an integer number (72800).

2^1998477 is an apocalyptic number.

It is an amenable number.

1998477 is a deficient number, since it is larger than the sum of its proper divisors (1495923).

1998477 is a wasteful number, since it uses less digits than its factorization.

1998477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 95 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1998477 is about 1413.6749980105. The cubic root of 1998477 is about 125.9601158722.

The spelling of 1998477 in words is "one million, nine hundred ninety-eight thousand, four hundred seventy-seven".