31404230 has 32 divisors (see below), whose sum is σ = 66413088. Its totient is φ = 10540800.

The previous prime is 31404211. The next prime is 31404251. The reversal of 31404230 is 3240413.

It is a junction number, because it is equal to n+sod(n) for n = 31404199 and 31404208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9551 + ... + 12410.

It is an arithmetic number, because the mean of its divisors is an integer number (2075409).

Almost surely, 2^31404230 is an apocalyptic number.

31404230 is an abundant number, since it is smaller than the sum of its proper divisors (35008858).

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

31404230 is a wasteful number, since it uses less digits than its factorization.

31404230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21992.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31404230 is about 5603.9477156733. The cubic root of 31404230 is about 315.4975926640.

Adding to 31404230 its reverse (3240413), we get a palindrome (34644643).

The spelling of 31404230 in words is "thirty-one million, four hundred four thousand, two hundred thirty".