30287040 has 112 divisors (see below), whose sum is σ = 109923072. Its totient is φ = 6921216.

The previous prime is 30287029. The next prime is 30287041. The reversal of 30287040 is 4078203.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 30287040.

It is not an unprimeable number, because it can be changed into a prime (30287041) 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, 4467 + ... + 8973.

It is an arithmetic number, because the mean of its divisors is an integer number (981456).

Almost surely, 2^30287040 is an apocalyptic number.

30287040 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 30287040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54961536).

30287040 is an abundant number, since it is smaller than the sum of its proper divisors (79636032).

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

30287040 is a wasteful number, since it uses less digits than its factorization.

30287040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534 (or 4524 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 30287040 is about 5503.3662425828. The cubic root of 30287040 is about 311.7111066806.

The spelling of 30287040 in words is "thirty million, two hundred eighty-seven thousand, forty".