30040557 has 4 divisors (see below), whose sum is σ = 40054080. Its totient is φ = 20027036.

The previous prime is 30040529. The next prime is 30040561. The reversal of 30040557 is 75504003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30040557 - 2⁷ = 30040429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30040057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5006757 + ... + 5006762.

It is an arithmetic number, because the mean of its divisors is an integer number (10013520).

Almost surely, 2^30040557 is an apocalyptic number.

It is an amenable number.

30040557 is a deficient number, since it is larger than the sum of its proper divisors (10013523).

30040557 is a wasteful number, since it uses less digits than its factorization.

30040557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10013522.

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 30040557 is about 5480.9266552290. The cubic root of 30040557 is about 310.8632097982.

The spelling of 30040557 in words is "thirty million, forty thousand, five hundred fifty-seven".