30700080 has 160 divisors (see below), whose sum is σ = 107939520. Its totient is φ = 8017920.

The previous prime is 30700063. The next prime is 30700081. The reversal of 30700080 is 8000703.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (30700081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131644 + ... + 131876.

It is an arithmetic number, because the mean of its divisors is an integer number (674622).

Almost surely, 2^30700080 is an apocalyptic number.

30700080 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30700080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53969760).

30700080 is an abundant number, since it is smaller than the sum of its proper divisors (77239440).

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

30700080 is a wasteful number, since it uses less digits than its factorization.

30700080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 30700080 is about 5540.7652901021. The cubic root of 30700080 is about 313.1217020700.

Adding to 30700080 its reverse (8000703), we get a palindrome (38700783).

The spelling of 30700080 in words is "thirty million, seven hundred thousand, eighty".