31436243240 has 32 divisors (see below), whose sum is σ = 72456710760. Its totient is φ = 12267801600.

The previous prime is 31436243227. The next prime is 31436243273. The reversal of 31436243240 is 4234263413.

It can be written as a sum of positive squares in 4 ways, for example, as 18117698404 + 13318544836 = 134602^2 + 115406^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31436243197 and 31436243206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9582581 + ... + 9585860.

Almost surely, 2^31436243240 is an apocalyptic number.

It is an amenable number.

31436243240 is an abundant number, since it is smaller than the sum of its proper divisors (41020467520).

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

31436243240 is a wasteful number, since it uses less digits than its factorization.

31436243240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19168493 (or 19168489 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

The spelling of 31436243240 in words is "thirty-one billion, four hundred thirty-six million, two hundred forty-three thousand, two hundred forty".