31740648 has 16 divisors (see below), whose sum is σ = 79351680. Its totient is φ = 10580208.

The previous prime is 31740629. The next prime is 31740671. The reversal of 31740648 is 84604713.

It is a super-3 number, since 3×31740648³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661240 + ... + 661287.

It is an arithmetic number, because the mean of its divisors is an integer number (4959480).

Almost surely, 2^31740648 is an apocalyptic number.

It is an amenable number.

31740648 is an abundant number, since it is smaller than the sum of its proper divisors (47611032).

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

31740648 is a wasteful number, since it uses less digits than its factorization.

31740648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322536 (or 1322532 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 31740648 is about 5633.8839178670. The cubic root of 31740648 is about 316.6201835126.

The spelling of 31740648 in words is "thirty-one million, seven hundred forty thousand, six hundred forty-eight".