10781998 has 4 divisors (see below), whose sum is σ = 16173000. Its totient is φ = 5390998.

The previous prime is 10781993. The next prime is 10782011. The reversal of 10781998 is 89918701.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10781993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2695498 + ... + 2695501.

It is an arithmetic number, because the mean of its divisors is an integer number (4043250).

Almost surely, 2^10781998 is an apocalyptic number.

10781998 is a deficient number, since it is larger than the sum of its proper divisors (5391002).

10781998 is an equidigital number, since it uses as much as digits as its factorization.

10781998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391001.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 10781998 is about 3283.5952856587. The cubic root of 10781998 is about 220.9190069227.

The spelling of 10781998 in words is "ten million, seven hundred eighty-one thousand, nine hundred ninety-eight".