30928084 has 18 divisors (see below), whose sum is σ = 59492762. Its totient is φ = 14058000.

The previous prime is 30928081. The next prime is 30928087. The reversal of 30928084 is 48082903.

It is an interprime number because it is at equal distance from previous prime (30928081) and next prime (30928087).

It can be written as a sum of positive squares in only one way, i.e., 30492484 + 435600 = 5522^2 + 660^2 .

It is a super-2 number, since 2×30928084² = 1913092759822112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30928081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31467 + ... + 32434.

Almost surely, 2^30928084 is an apocalyptic number.

It is an amenable number.

30928084 is a deficient number, since it is larger than the sum of its proper divisors (28564678).

30928084 is a wasteful number, since it uses less digits than its factorization.

30928084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63927 (or 63914 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 30928084 is about 5561.3023654536. The cubic root of 30928084 is about 313.8949572232.

The spelling of 30928084 in words is "thirty million, nine hundred twenty-eight thousand, eighty-four".