31428804 has 48 divisors (see below), whose sum is σ = 80329536. Its totient is φ = 9484800.

The previous prime is 31428797. The next prime is 31428809. The reversal of 31428804 is 40882413.

It is not an unprimeable number, because it can be changed into a prime (31428809) 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 15 ways as a sum of consecutive naturals, for example, 60064 + ... + 60584.

It is an arithmetic number, because the mean of its divisors is an integer number (1673532).

Almost surely, 2^31428804 is an apocalyptic number.

It is an amenable number.

31428804 is an abundant number, since it is smaller than the sum of its proper divisors (48900732).

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

31428804 is a wasteful number, since it uses less digits than its factorization.

31428804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 31428804 is about 5606.1398484162. The cubic root of 31428804 is about 315.5798641335.

The spelling of 31428804 in words is "thirty-one million, four hundred twenty-eight thousand, eight hundred four".