31443948 has 72 divisors (see below), whose sum is σ = 84913920. Its totient is φ = 9776640.

The previous prime is 31443941. The next prime is 31443949. The reversal of 31443948 is 84934413.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31443941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116758 + ... + 117026.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^31443948 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31443948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42456960).

31443948 is an abundant number, since it is smaller than the sum of its proper divisors (53469972).

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

31443948 is a wasteful number, since it uses less digits than its factorization.

31443948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 482 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 31443948 is about 5607.4903477402. The cubic root of 31443948 is about 315.6305434833.

It can be divided in two parts, 3144394 and 8, that multiplied together give a palindrome (25155152).

The spelling of 31443948 in words is "thirty-one million, four hundred forty-three thousand, nine hundred forty-eight".