30740 has 24 divisors (see below), whose sum is σ = 68040. Its totient is φ = 11648.

The previous prime is 30727. The next prime is 30757. The reversal of 30740 is 4703.

It can be written as a sum of positive squares in 4 ways, for example, as 5776 + 24964 = 76^2 + 158^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554 + ... + 606.

It is an arithmetic number, because the mean of its divisors is an integer number (2835).

2³⁰⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34020).

30740 is an abundant number, since it is smaller than the sum of its proper divisors (37300).

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

30740 is a wasteful number, since it uses less digits than its factorization.

30740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 30740 is about 175.3282635515. The cubic root of 30740 is about 31.3257363001.

The spelling of 30740 in words is "thirty thousand, seven hundred forty".