31228490 has 16 divisors (see below), whose sum is σ = 59518152. Its totient is φ = 11756544.

The previous prime is 31228469. The next prime is 31228537. The reversal of 31228490 is 9482213.

It can be written as a sum of positive squares in 4 ways, for example, as 19864849 + 11363641 = 4457^2 + 3371^2 .

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, 91679 + ... + 92018.

Almost surely, 2^31228490 is an apocalyptic number.

31228490 is a deficient number, since it is larger than the sum of its proper divisors (28289662).

31228490 is a wasteful number, since it uses less digits than its factorization.

31228490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183721.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 31228490 is about 5588.2456996807. The cubic root of 31228490 is about 314.9079768145.

The spelling of 31228490 in words is "thirty-one million, two hundred twenty-eight thousand, four hundred ninety".