6440974 has 8 divisors (see below), whose sum is σ = 9867168. Its totient is φ = 3151920.

The previous prime is 6440969. The next prime is 6440983. The reversal of 6440974 is 4790446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6440974² = 82972292137352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34167 + ... + 34354.

It is an arithmetic number, because the mean of its divisors is an integer number (1233396).

Almost surely, 2^6440974 is an apocalyptic number.

6440974 is a deficient number, since it is larger than the sum of its proper divisors (3426194).

6440974 is a wasteful number, since it uses less digits than its factorization.

6440974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68570.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 6440974 is about 2537.9074057183. The cubic root of 6440974 is about 186.0589284128.

The spelling of 6440974 in words is "six million, four hundred forty thousand, nine hundred seventy-four".