30045870 has 64 divisors (see below), whose sum is σ = 80619840. Its totient is φ = 7962624.

The previous prime is 30045811. The next prime is 30045871. The reversal of 30045870 is 7854003.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30045871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69174 + ... + 69606.

It is an arithmetic number, because the mean of its divisors is an integer number (1259685).

Almost surely, 2^30045870 is an apocalyptic number.

30045870 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 30045870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40309920).

30045870 is an abundant number, since it is smaller than the sum of its proper divisors (50573970).

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

30045870 is a wasteful number, since it uses less digits than its factorization.

30045870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 30045870 is about 5481.4113146160. The cubic root of 30045870 is about 310.8815352338.

Adding to 30045870 its reverse (7854003), we get a palindrome (37899873).

The spelling of 30045870 in words is "thirty million, forty-five thousand, eight hundred seventy".