30945400 has 24 divisors (see below), whose sum is σ = 71948520. Its totient is φ = 12378080.

The previous prime is 30945391. The next prime is 30945401. The reversal of 30945400 is 454903.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30945401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77164 + ... + 77563.

It is an arithmetic number, because the mean of its divisors is an integer number (2997855).

Almost surely, 2^30945400 is an apocalyptic number.

It is an amenable number.

30945400 is an abundant number, since it is smaller than the sum of its proper divisors (41003120).

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

30945400 is a wasteful number, since it uses less digits than its factorization.

30945400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154743 (or 154734 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 30945400 is about 5562.8589771807. The cubic root of 30945400 is about 313.9535274104.

The spelling of 30945400 in words is "thirty million, nine hundred forty-five thousand, four hundred".