31428160 has 28 divisors (see below), whose sum is σ = 74839068. Its totient is φ = 12571136.

The previous prime is 31428151. The next prime is 31428167. The reversal of 31428160 is 6182413.

It can be written as a sum of positive squares in 2 ways, for example, as 15936064 + 15492096 = 3992^2 + 3936^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31428167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48787 + ... + 49426.

Almost surely, 2^31428160 is an apocalyptic number.

It is an amenable number.

31428160 is an abundant number, since it is smaller than the sum of its proper divisors (43410908).

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

31428160 is an equidigital number, since it uses as much as digits as its factorization.

31428160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98230 (or 98220 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 31428160 is about 5606.0824110960. The cubic root of 31428160 is about 315.5777086286.

The spelling of 31428160 in words is "thirty-one million, four hundred twenty-eight thousand, one hundred sixty".