30161970 has 80 divisors (see below), whose sum is σ = 84680640. Its totient is φ = 7688736.

The previous prime is 30161959. The next prime is 30161981. The reversal of 30161970 is 7916103.

It is an interprime number because it is at equal distance from previous prime (30161959) and next prime (30161981).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17821 + ... + 19439.

It is an arithmetic number, because the mean of its divisors is an integer number (1058508).

Almost surely, 2^30161970 is an apocalyptic number.

30161970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30161970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42340320).

30161970 is an abundant number, since it is smaller than the sum of its proper divisors (54518670).

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

30161970 is a wasteful number, since it uses less digits than its factorization.

30161970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1652 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 30161970 is about 5491.9914420909. The cubic root of 30161970 is about 311.2814455093.

The spelling of 30161970 in words is "thirty million, one hundred sixty-one thousand, nine hundred seventy".