30557406 has 32 divisors (see below), whose sum is σ = 67620096. Its totient is φ = 9128000.

The previous prime is 30557399. The next prime is 30557411. The reversal of 30557406 is 60475503.

It is a super-2 number, since 2×30557406² = 1867510122897672, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 1426 + ... + 7946.

It is an arithmetic number, because the mean of its divisors is an integer number (2113128).

Almost surely, 2^30557406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30557406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33810048).

30557406 is an abundant number, since it is smaller than the sum of its proper divisors (37062690).

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

30557406 is a wasteful number, since it uses less digits than its factorization.

30557406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6608.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 30557406 is about 5527.8753603894. The cubic root of 30557406 is about 312.6358867161.

The spelling of 30557406 in words is "thirty million, five hundred fifty-seven thousand, four hundred six".