30543940 has 24 divisors (see below), whose sum is σ = 73305792. Its totient is φ = 10472160.

The previous prime is 30543841. The next prime is 30543941. The reversal of 30543940 is 4934503.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 30543899 and 30543908.

It is not an unprimeable number, because it can be changed into a prime (30543941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108946 + ... + 109225.

It is an arithmetic number, because the mean of its divisors is an integer number (3054408).

Almost surely, 2^30543940 is an apocalyptic number.

It is an amenable number.

30543940 is an abundant number, since it is smaller than the sum of its proper divisors (42761852).

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

30543940 is a wasteful number, since it uses less digits than its factorization.

30543940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218187 (or 218185 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 30543940 is about 5526.6572175231. The cubic root of 30543940 is about 312.5899559695.

The spelling of 30543940 in words is "thirty million, five hundred forty-three thousand, nine hundred forty".