31440229989 has 16 divisors (see below), whose sum is σ = 47994035712. Its totient is φ = 17933928048.

The previous prime is 31440229973. The next prime is 31440229999. The reversal of 31440229989 is 98992204413.

It is not a de Polignac number, because 31440229989 - 2⁴ = 31440229973 is a prime.

It is a super-2 number, since 2×31440229989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440229949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1317799 + ... + 1341444.

It is an arithmetic number, because the mean of its divisors is an integer number (2999627232).

Almost surely, 2^31440229989 is an apocalyptic number.

It is an amenable number.

31440229989 is a deficient number, since it is larger than the sum of its proper divisors (16553805723).

31440229989 is a wasteful number, since it uses less digits than its factorization.

31440229989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659816.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 31440229989 in words is "thirty-one billion, four hundred forty million, two hundred twenty-nine thousand, nine hundred eighty-nine".