31423248 has 40 divisors (see below), whose sum is σ = 90197600. Its totient is φ = 10474272.

The previous prime is 31423241. The next prime is 31423253. The reversal of 31423248 is 84232413.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (31423241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35938 + ... + 36801.

It is an arithmetic number, because the mean of its divisors is an integer number (2254940).

Almost surely, 2^31423248 is an apocalyptic number.

It is an amenable number.

31423248 is an abundant number, since it is smaller than the sum of its proper divisors (58774352).

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

31423248 is a wasteful number, since it uses less digits than its factorization.

31423248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72756 (or 72744 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 31423248 is about 5605.6442983835. The cubic root of 31423248 is about 315.5612669145.

The spelling of 31423248 in words is "thirty-one million, four hundred twenty-three thousand, two hundred forty-eight".