31426540 has 24 divisors (see below), whose sum is σ = 69878592. Its totient is φ = 11831040.

The previous prime is 31426511. The next prime is 31426559. The reversal of 31426540 is 4562413.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45876 + ... + 46555.

It is an arithmetic number, because the mean of its divisors is an integer number (2911608).

Almost surely, 2^31426540 is an apocalyptic number.

It is an amenable number.

31426540 is an abundant number, since it is smaller than the sum of its proper divisors (38452052).

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

31426540 is a wasteful number, since it uses less digits than its factorization.

31426540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92457 (or 92455 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 31426540 is about 5605.9379233095. The cubic root of 31426540 is about 315.5722862657.

Adding to 31426540 its reverse (4562413), we get a palindrome (35988953).

The spelling of 31426540 in words is "thirty-one million, four hundred twenty-six thousand, five hundred forty".