8340981 has 32 divisors (see below), whose sum is σ = 13063680. Its totient is φ = 4680000.

The previous prime is 8340977. The next prime is 8340989. The reversal of 8340981 is 1890438.

It is not a de Polignac number, because 8340981 - 2² = 8340977 is a prime.

It is a super-2 number, since 2×8340981² = 139143928084722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8340989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33106 + ... + 33356.

It is an arithmetic number, because the mean of its divisors is an integer number (408240).

Almost surely, 2^8340981 is an apocalyptic number.

It is an amenable number.

8340981 is a deficient number, since it is larger than the sum of its proper divisors (4722699).

8340981 is a wasteful number, since it uses less digits than its factorization.

8340981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 8340981 is about 2888.0756569037. The cubic root of 8340981 is about 202.8020670945.

The spelling of 8340981 in words is "eight million, three hundred forty thousand, nine hundred eighty-one".