2621998 has 4 divisors (see below), whose sum is σ = 3933000. Its totient is φ = 1310998.

The previous prime is 2621987. The next prime is 2622013. The reversal of 2621998 is 8991262.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655498 + ... + 655501.

It is an arithmetic number, because the mean of its divisors is an integer number (983250).

2^2621998 is an apocalyptic number.

2621998 is a deficient number, since it is larger than the sum of its proper divisors (1311002).

2621998 is a wasteful number, since it uses less digits than its factorization.

2621998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311001.

The product of its digits is 15552, while the sum is 37.

The square root of 2621998 is about 1619.2584722644. The cubic root of 2621998 is about 137.8936027896.

The spelling of 2621998 in words is "two million, six hundred twenty-one thousand, nine hundred ninety-eight".