30475900 has 144 divisors (see below), whose sum is σ = 86619456. Its totient is φ = 9031680.

The previous prime is 30475891. The next prime is 30475903. The reversal of 30475900 is 957403.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30475903) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154602 + ... + 154798.

It is an arithmetic number, because the mean of its divisors is an integer number (601524).

Almost surely, 2^30475900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30475900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43309728).

30475900 is an abundant number, since it is smaller than the sum of its proper divisors (56143556).

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

30475900 is a wasteful number, since it uses less digits than its factorization.

30475900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 30475900 is about 5520.4981659267. The cubic root of 30475900 is about 312.3576738550.

It can be divided in two parts, 30475 and 900, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 30475900 in words is "thirty million, four hundred seventy-five thousand, nine hundred".