31472858 has 4 divisors (see below), whose sum is σ = 47209290. Its totient is φ = 15736428.

The previous prime is 31472851. The next prime is 31472867. The reversal of 31472858 is 85827413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85827413 = 7 ⋅12261059.

It can be written as a sum of positive squares in only one way, i.e., 21967969 + 9504889 = 4687^2 + 3083^2 .

It is not an unprimeable number, because it can be changed into a prime (31472851) 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 as a sum of consecutive naturals, namely, 7868213 + ... + 7868216.

Almost surely, 2^31472858 is an apocalyptic number.

31472858 is a deficient number, since it is larger than the sum of its proper divisors (15736432).

31472858 is a wasteful number, since it uses less digits than its factorization.

31472858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15736431.

The product of its digits is 53760, while the sum is 38.

The square root of 31472858 is about 5610.0675575255. The cubic root of 31472858 is about 315.7272455464.

The spelling of 31472858 in words is "thirty-one million, four hundred seventy-two thousand, eight hundred fifty-eight".