31493742 has 16 divisors (see below), whose sum is σ = 71985792. Its totient is φ = 8998200.

The previous prime is 31493717. The next prime is 31493743. The reversal of 31493742 is 24739413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31493743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374884 + ... + 374967.

It is an arithmetic number, because the mean of its divisors is an integer number (4499112).

Almost surely, 2^31493742 is an apocalyptic number.

31493742 is an abundant number, since it is smaller than the sum of its proper divisors (40492050).

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

31493742 is a wasteful number, since it uses less digits than its factorization.

31493742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749863.

The product of its digits is 18144, while the sum is 33.

The square root of 31493742 is about 5611.9285455180. The cubic root of 31493742 is about 315.7970643292.

The spelling of 31493742 in words is "thirty-one million, four hundred ninety-three thousand, seven hundred forty-two".