31408673442 has 32 divisors (see below), whose sum is σ = 68310127872. Its totient is φ = 9587384064.

The previous prime is 31408673441. The next prime is 31408673449. The reversal of 31408673442 is 24437680413.

It is a super-2 number, since 2×31408673442² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31408673394 and 31408673403.

It is not an unprimeable number, because it can be changed into a prime (31408673441) 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, 4157418 + ... + 4164965.

It is an arithmetic number, because the mean of its divisors is an integer number (2134691496).

Almost surely, 2^31408673442 is an apocalyptic number.

31408673442 is an abundant number, since it is smaller than the sum of its proper divisors (36901454430).

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

31408673442 is a wasteful number, since it uses less digits than its factorization.

31408673442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8322442.

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 31408673442 in words is "thirty-one billion, four hundred eight million, six hundred seventy-three thousand, four hundred forty-two".