31398446 has 4 divisors (see below), whose sum is σ = 47097672. Its totient is φ = 15699222.

The previous prime is 31398407. The next prime is 31398457. The reversal of 31398446 is 64489313.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×31398446² = 1971724822429832, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7849610 + ... + 7849613.

It is an arithmetic number, because the mean of its divisors is an integer number (11774418).

Almost surely, 2^31398446 is an apocalyptic number.

31398446 is a deficient number, since it is larger than the sum of its proper divisors (15699226).

31398446 is a wasteful number, since it uses less digits than its factorization.

31398446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15699225.

The product of its digits is 62208, while the sum is 38.

The square root of 31398446 is about 5603.4316271371. The cubic root of 31398446 is about 315.4782221299.

The spelling of 31398446 in words is "thirty-one million, three hundred ninety-eight thousand, four hundred forty-six".