31446428 has 24 divisors (see below), whose sum is σ = 61843488. Its totient is φ = 13882176.

The previous prime is 31446427. The next prime is 31446439. The reversal of 31446428 is 82464413.

It is a junction number, because it is equal to n+sod(n) for n = 31446394 and 31446403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31446427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11951 + ... + 14342.

It is an arithmetic number, because the mean of its divisors is an integer number (2576812).

Almost surely, 2^31446428 is an apocalyptic number.

It is an amenable number.

31446428 is a deficient number, since it is larger than the sum of its proper divisors (30397060).

31446428 is a wasteful number, since it uses less digits than its factorization.

31446428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26333 (or 26331 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 31446428 is about 5607.7114761728. The cubic root of 31446428 is about 315.6388412451.

The spelling of 31446428 in words is "thirty-one million, four hundred forty-six thousand, four hundred twenty-eight".