31448397 has 8 divisors (see below), whose sum is σ = 41997280. Its totient is φ = 20932560.

The previous prime is 31448381. The next prime is 31448413. The reversal of 31448397 is 79384413.

It is an interprime number because it is at equal distance from previous prime (31448381) and next prime (31448413).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31448397 - 2⁴ = 31448381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31448377) 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, 5947 + ... + 9912.

It is an arithmetic number, because the mean of its divisors is an integer number (5249660).

Almost surely, 2^31448397 is an apocalyptic number.

It is an amenable number.

31448397 is a deficient number, since it is larger than the sum of its proper divisors (10548883).

31448397 is a wasteful number, since it uses less digits than its factorization.

31448397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16523.

The product of its digits is 72576, while the sum is 39.

The square root of 31448397 is about 5607.8870352389. The cubic root of 31448397 is about 315.6454289558.

The spelling of 31448397 in words is "thirty-one million, four hundred forty-eight thousand, three hundred ninety-seven".