6428931 has 8 divisors (see below), whose sum is σ = 8675520. Its totient is φ = 4234152.

The previous prime is 6428921. The next prime is 6428957. The reversal of 6428931 is 1398246.

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

It is not a de Polignac number, because 6428931 - 2⁷ = 6428803 is a prime.

It is a super-2 number, since 2×6428931² = 82662307605522, which contains 22 as substring.

6428931 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6428892 and 6428901.

It is not an unprimeable number, because it can be changed into a prime (6428921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12661 + ... + 13158.

It is an arithmetic number, because the mean of its divisors is an integer number (1084440).

Almost surely, 2^6428931 is an apocalyptic number.

6428931 is a deficient number, since it is larger than the sum of its proper divisors (2246589).

6428931 is a wasteful number, since it uses less digits than its factorization.

6428931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25905.

The product of its digits is 10368, while the sum is 33.

The square root of 6428931 is about 2535.5336716360. The cubic root of 6428931 is about 185.9428949450.

The spelling of 6428931 in words is "six million, four hundred twenty-eight thousand, nine hundred thirty-one".