31420036 has 6 divisors (see below), whose sum is σ = 54985070. Its totient is φ = 15710016.

The previous prime is 31420033. The next prime is 31420069. The reversal of 31420036 is 63002413.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 8667136 = 4770^2 + 2944^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31419995 and 31420022.

It is not an unprimeable number, because it can be changed into a prime (31420033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927501 + ... + 3927508.

Almost surely, 2^31420036 is an apocalyptic number.

It is an amenable number.

31420036 is a deficient number, since it is larger than the sum of its proper divisors (23565034).

31420036 is a wasteful number, since it uses less digits than its factorization.

31420036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855013 (or 7855011 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 31420036 is about 5605.3577941109. The cubic root of 31420036 is about 315.5505146064.

Adding to 31420036 its reverse (63002413), we get a palindrome (94422449).

The spelling of 31420036 in words is "thirty-one million, four hundred twenty thousand, thirty-six".