31671400 has 24 divisors (see below), whose sum is σ = 73636470. Its totient is φ = 12668480.

The previous prime is 31671361. The next prime is 31671403. The reversal of 31671400 is 417613.

It can be written as a sum of positive squares in 3 ways, for example, as 28366276 + 3305124 = 5326^2 + 1818^2 .

It is not an unprimeable number, because it can be changed into a prime (31671403) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 78979 + ... + 79378.

Almost surely, 2^31671400 is an apocalyptic number.

It is an amenable number.

31671400 is an abundant number, since it is smaller than the sum of its proper divisors (41965070).

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

31671400 is a wasteful number, since it uses less digits than its factorization.

31671400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158373 (or 158364 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 31671400 is about 5627.7348906998. The cubic root of 31671400 is about 316.3897610114.

The spelling of 31671400 in words is "thirty-one million, six hundred seventy-one thousand, four hundred".