31349680 has 40 divisors (see below), whose sum is σ = 75245184. Its totient is φ = 12134400.

The previous prime is 31349663. The next prime is 31349687. The reversal of 31349680 is 8694313.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×31349680² = 1965604872204800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31349687) 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, 3841 + ... + 8800.

Almost surely, 2^31349680 is an apocalyptic number.

It is an amenable number.

31349680 is an abundant number, since it is smaller than the sum of its proper divisors (43895504).

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

31349680 is a wasteful number, since it uses less digits than its factorization.

31349680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12685 (or 12679 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 31349680 is about 5599.0784956098. The cubic root of 31349680 is about 315.3148108298.

The spelling of 31349680 in words is "thirty-one million, three hundred forty-nine thousand, six hundred eighty".