2471998 has 4 divisors (see below), whose sum is σ = 3708000. Its totient is φ = 1235998.

The previous prime is 2471993. The next prime is 2472023. The reversal of 2471998 is 8991742.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2471998² = 12221548224008, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2471998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2471993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617998 + ... + 618001.

It is an arithmetic number, because the mean of its divisors is an integer number (927000).

2^2471998 is an apocalyptic number.

2471998 is a deficient number, since it is larger than the sum of its proper divisors (1236002).

2471998 is a wasteful number, since it uses less digits than its factorization.

2471998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236001.

The product of its digits is 36288, while the sum is 40.

The square root of 2471998 is about 1572.2588845352. The cubic root of 2471998 is about 135.2122495699.

The spelling of 2471998 in words is "two million, four hundred seventy-one thousand, nine hundred ninety-eight".