31384489 has 8 divisors (see below), whose sum is σ = 32918400. Its totient is φ = 29864736.

The previous prime is 31384487. The next prime is 31384513. The reversal of 31384489 is 98448313.

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

It is a cyclic number.

It is not a de Polignac number, because 31384489 - 2¹ = 31384487 is a prime.

It is a super-2 number, since 2×31384489² = 1969972299582242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31384487) 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, 1149 + ... + 8005.

It is an arithmetic number, because the mean of its divisors is an integer number (4114800).

Almost surely, 2^31384489 is an apocalyptic number.

It is an amenable number.

31384489 is a deficient number, since it is larger than the sum of its proper divisors (1533911).

31384489 is a wasteful number, since it uses less digits than its factorization.

31384489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7079.

The product of its digits is 82944, while the sum is 40.

The square root of 31384489 is about 5602.1860911612. The cubic root of 31384489 is about 315.4314705367.

The spelling of 31384489 in words is "thirty-one million, three hundred eighty-four thousand, four hundred eighty-nine".