3191428 has 12 divisors (see below), whose sum is σ = 5680080. Its totient is φ = 1568552.

The previous prime is 3191423. The next prime is 3191429. The reversal of 3191428 is 8241913.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3191396 and 3191405.

It is not an unprimeable number, because it can be changed into a prime (3191423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6526 + ... + 6997.

It is an arithmetic number, because the mean of its divisors is an integer number (473340).

Almost surely, 2^3191428 is an apocalyptic number.

It is an amenable number.

3191428 is a deficient number, since it is larger than the sum of its proper divisors (2488652).

3191428 is a wasteful number, since it uses less digits than its factorization.

3191428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13586 (or 13584 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 3191428 is about 1786.4568284736. The cubic root of 3191428 is about 147.2295609543.

The spelling of 3191428 in words is "three million, one hundred ninety-one thousand, four hundred twenty-eight".