31434388 has 6 divisors (see below), whose sum is σ = 55010186. Its totient is φ = 15717192.

The previous prime is 31434373. The next prime is 31434407. The reversal of 31434388 is 88343413.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 31382404 + 51984 = 5602^2 + 228^2 .

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, 3929295 + ... + 3929302.

Almost surely, 2^31434388 is an apocalyptic number.

It is an amenable number.

31434388 is a deficient number, since it is larger than the sum of its proper divisors (23575798).

31434388 is a wasteful number, since it uses less digits than its factorization.

31434388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858601 (or 7858599 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 31434388 is about 5606.6378516897. The cubic root of 31434388 is about 315.5985528668.

The spelling of 31434388 in words is "thirty-one million, four hundred thirty-four thousand, three hundred eighty-eight".