30531400 has 24 divisors (see below), whose sum is σ = 70985970. Its totient is φ = 12212480.

The previous prime is 30531353. The next prime is 30531421. The reversal of 30531400 is 413503.

It can be written as a sum of positive squares in 3 ways, for example, as 21734244 + 8797156 = 4662^2 + 2966^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76129 + ... + 76528.

Almost surely, 2^30531400 is an apocalyptic number.

It is an amenable number.

30531400 is an abundant number, since it is smaller than the sum of its proper divisors (40454570).

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

30531400 is a wasteful number, since it uses less digits than its factorization.

30531400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152673 (or 152664 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 30531400 is about 5525.5225997185. The cubic root of 30531400 is about 312.5471715458.

Adding to 30531400 its reverse (413503), we get a palindrome (30944903).

The spelling of 30531400 in words is "thirty million, five hundred thirty-one thousand, four hundred".