6931428 has 96 divisors (see below), whose sum is σ = 20106240. Its totient is φ = 1814400.

The previous prime is 6931411. The next prime is 6931429. The reversal of 6931428 is 8241396.

6931428 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6931429) 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, 68578 + ... + 68678.

It is an arithmetic number, because the mean of its divisors is an integer number (209440).

Almost surely, 2^6931428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6931428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10053120).

6931428 is an abundant number, since it is smaller than the sum of its proper divisors (13174812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6931428 is a wasteful number, since it uses less digits than its factorization.

6931428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 175 counting only the distinct ones).

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

The square root of 6931428 is about 2632.7605284188. The cubic root of 6931428 is about 190.6664316644. Note that the first 3 decimals are identical.

Subtracting from 6931428 its product of digits (10368), we obtain a triangular number (6921060 = T₃₇₂₀).

The spelling of 6931428 in words is "six million, nine hundred thirty-one thousand, four hundred twenty-eight".