30861480 has 128 divisors (see below), whose sum is σ = 101445120. Its totient is φ = 7464960.

The previous prime is 30861451. The next prime is 30861503. The reversal of 30861480 is 8416803.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113745 + ... + 114015.

It is an arithmetic number, because the mean of its divisors is an integer number (792540).

Almost surely, 2^30861480 is an apocalyptic number.

30861480 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 30861480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50722560).

30861480 is an abundant number, since it is smaller than the sum of its proper divisors (70583640).

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

30861480 is a wasteful number, since it uses less digits than its factorization.

30861480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 30861480 is about 5555.3109723939. The cubic root of 30861480 is about 313.6694697634.

The spelling of 30861480 in words is "thirty million, eight hundred sixty-one thousand, four hundred eighty".