31428192 has 48 divisors (see below), whose sum is σ = 82797120. Its totient is φ = 10438272.

The previous prime is 31428191. The next prime is 31428253. The reversal of 31428192 is 29182413.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×31428192³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31428191) 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, 42159 + ... + 42897.

It is an arithmetic number, because the mean of its divisors is an integer number (1724940).

Almost surely, 2^31428192 is an apocalyptic number.

31428192 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31428192 is an abundant number, since it is smaller than the sum of its proper divisors (51368928).

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

31428192 is a wasteful number, since it uses less digits than its factorization.

31428192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195 (or 1187 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 31428192 is about 5606.0852651382. The cubic root of 31428192 is about 315.5778157352.

The spelling of 31428192 in words is "thirty-one million, four hundred twenty-eight thousand, one hundred ninety-two".