31429072 has 10 divisors (see below), whose sum is σ = 60893858. Its totient is φ = 15714528.

The previous prime is 31429061. The next prime is 31429081. The reversal of 31429072 is 27092413.

It can be written as a sum of positive squares in only one way, i.e., 28686736 + 2742336 = 5356^2 + 1656^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31429072.

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, 982143 + ... + 982174.

Almost surely, 2^31429072 is an apocalyptic number.

It is an amenable number.

31429072 is a deficient number, since it is larger than the sum of its proper divisors (29464786).

31429072 is a wasteful number, since it uses less digits than its factorization.

31429072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964325 (or 1964319 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 31429072 is about 5606.1637507301. The cubic root of 31429072 is about 315.5807611362.

The spelling of 31429072 in words is "thirty-one million, four hundred twenty-nine thousand, seventy-two".