31429450 has 24 divisors (see below), whose sum is σ = 62956908. Its totient is φ = 11604480.

The previous prime is 31429441. The next prime is 31429469. The reversal of 31429450 is 5492413.

It can be written as a sum of positive squares in 6 ways, for example, as 881721 + 30547729 = 939^2 + 5527^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23527 + ... + 24826.

Almost surely, 2^31429450 is an apocalyptic number.

31429450 is an abundant number, since it is smaller than the sum of its proper divisors (31527458).

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

31429450 is a wasteful number, since it uses less digits than its factorization.

31429450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48378 (or 48373 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 31429450 is about 5606.1974635220. The cubic root of 31429450 is about 315.5820263029.

The spelling of 31429450 in words is "thirty-one million, four hundred twenty-nine thousand, four hundred fifty".