30970830 has 32 divisors (see below), whose sum is σ = 81088128. Its totient is φ = 7508000.

The previous prime is 30970783. The next prime is 30970837. The reversal of 30970830 is 3807903.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30970837) 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, 46596 + ... + 47255.

It is an arithmetic number, because the mean of its divisors is an integer number (2534004).

Almost surely, 2^30970830 is an apocalyptic number.

30970830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30970830 is an abundant number, since it is smaller than the sum of its proper divisors (50117298).

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

30970830 is a wasteful number, since it uses less digits than its factorization.

30970830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93872.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 30970830 is about 5565.1442029834. The cubic root of 30970830 is about 314.0395030561.

The spelling of 30970830 in words is "thirty million, nine hundred seventy thousand, eight hundred thirty".