31420448 has 12 divisors (see below), whose sum is σ = 61859070. Its totient is φ = 15710208.

The previous prime is 31420447. The next prime is 31420457. The reversal of 31420448 is 84402413.

It can be written as a sum of positive squares in only one way, i.e., 19114384 + 12306064 = 4372^2 + 3508^2 .

It is not an unprimeable number, because it can be changed into a prime (31420447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490913 + ... + 490976.

Almost surely, 2^31420448 is an apocalyptic number.

It is an amenable number.

31420448 is a deficient number, since it is larger than the sum of its proper divisors (30438622).

31420448 is an equidigital number, since it uses as much as digits as its factorization.

31420448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981899 (or 981891 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 31420448 is about 5605.3945445437. The cubic root of 31420448 is about 315.5518938351.

The spelling of 31420448 in words is "thirty-one million, four hundred twenty thousand, four hundred forty-eight".