31828040 has 32 divisors (see below), whose sum is σ = 75384000. Its totient is φ = 12060864.

The previous prime is 31828019. The next prime is 31828061. The reversal of 31828040 is 4082813.

It is an interprime number because it is at equal distance from previous prime (31828019) and next prime (31828061).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20180 + ... + 21699.

It is an arithmetic number, because the mean of its divisors is an integer number (2355750).

Almost surely, 2^31828040 is an apocalyptic number.

It is an amenable number.

31828040 is an abundant number, since it is smaller than the sum of its proper divisors (43555960).

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

31828040 is a wasteful number, since it uses less digits than its factorization.

31828040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41909 (or 41905 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 31828040 is about 5641.6345149256. The cubic root of 31828040 is about 316.9105022551.

The spelling of 31828040 in words is "thirty-one million, eight hundred twenty-eight thousand, forty".