31442064 has 20 divisors (see below), whose sum is σ = 81225456. Its totient is φ = 10480672.

The previous prime is 31441999. The next prime is 31442069. The reversal of 31442064 is 46024413.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31442069) 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 3 ways as a sum of consecutive naturals, for example, 327474 + ... + 327569.

Almost surely, 2^31442064 is an apocalyptic number.

It is an amenable number.

31442064 is an abundant number, since it is smaller than the sum of its proper divisors (49783392).

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

31442064 is a wasteful number, since it uses less digits than its factorization.

31442064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655054 (or 655048 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 31442064 is about 5607.3223556346. The cubic root of 31442064 is about 315.6242395695.

Adding to 31442064 its reverse (46024413), we get a palindrome (77466477).

The spelling of 31442064 in words is "thirty-one million, four hundred forty-two thousand, sixty-four".