30706240 has 28 divisors (see below), whose sum is σ = 73119996. Its totient is φ = 12282368.

The previous prime is 30706231. The next prime is 30706243. The reversal of 30706240 is 4260703.

It can be written as a sum of positive squares in 2 ways, for example, as 13133376 + 17572864 = 3624^2 + 4192^2 .

It is not an unprimeable number, because it can be changed into a prime (30706243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47659 + ... + 48298.

Almost surely, 2^30706240 is an apocalyptic number.

It is an amenable number.

30706240 is an abundant number, since it is smaller than the sum of its proper divisors (42413756).

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

30706240 is an equidigital number, since it uses as much as digits as its factorization.

30706240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95974 (or 95964 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 30706240 is about 5541.3211421104. The cubic root of 30706240 is about 313.1426433911.

Adding to 30706240 its reverse (4260703), we get a palindrome (34966943).

The spelling of 30706240 in words is "thirty million, seven hundred six thousand, two hundred forty".