31458042 has 48 divisors (see below), whose sum is σ = 84981312. Its totient is φ = 8170560.

The previous prime is 31458013. The next prime is 31458061. The reversal of 31458042 is 24085413.

It is a junction number, because it is equal to n+sod(n) for n = 31457997 and 31458015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9963 + ... + 12734.

It is an arithmetic number, because the mean of its divisors is an integer number (1770444).

Almost surely, 2^31458042 is an apocalyptic number.

31458042 is an abundant number, since it is smaller than the sum of its proper divisors (53523270).

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

31458042 is a wasteful number, since it uses less digits than its factorization.

31458042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22723 (or 22720 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 31458042 is about 5608.7469188759. The cubic root of 31458042 is about 315.6776943945.

The spelling of 31458042 in words is "thirty-one million, four hundred fifty-eight thousand, forty-two".