30506070 has 32 divisors (see below), whose sum is σ = 83674368. Its totient is φ = 6972768.

The previous prime is 30506059. The next prime is 30506071. The reversal of 30506070 is 7060503.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30506071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72424 + ... + 72843.

It is an arithmetic number, because the mean of its divisors is an integer number (2614824).

Almost surely, 2^30506070 is an apocalyptic number.

30506070 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30506070 is an abundant number, since it is smaller than the sum of its proper divisors (53168298).

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

30506070 is a wasteful number, since it uses less digits than its factorization.

30506070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145284.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 30506070 is about 5523.2300332324. The cubic root of 30506070 is about 312.4607139947.

Adding to 30506070 its reverse (7060503), we get a palindrome (37566573).

The spelling of 30506070 in words is "thirty million, five hundred six thousand, seventy".