31478342 has 32 divisors (see below), whose sum is σ = 56310528. Its totient is φ = 12915936.

The previous prime is 31478341. The next prime is 31478351. The reversal of 31478342 is 24387413.

It is a junction number, because it is equal to n+sod(n) for n = 31478299 and 31478308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31478341) 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, 34253 + ... + 35159.

It is an arithmetic number, because the mean of its divisors is an integer number (1759704).

Almost surely, 2^31478342 is an apocalyptic number.

31478342 is a deficient number, since it is larger than the sum of its proper divisors (24832186).

31478342 is a wasteful number, since it uses less digits than its factorization.

31478342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020.

The product of its digits is 16128, while the sum is 32.

The square root of 31478342 is about 5610.5563004037. The cubic root of 31478342 is about 315.7455824857.

The spelling of 31478342 in words is "thirty-one million, four hundred seventy-eight thousand, three hundred forty-two".