31438030 has 64 divisors (see below), whose sum is σ = 65318400. Its totient is φ = 10805760.

The previous prime is 31438013. The next prime is 31438037. The reversal of 31438030 is 3083413.

It is a junction number, because it is equal to n+sod(n) for n = 31437992 and 31438010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31438037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116736 + ... + 117004.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^31438030 is an apocalyptic number.

31438030 is an abundant number, since it is smaller than the sum of its proper divisors (33880370).

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

31438030 is a wasteful number, since it uses less digits than its factorization.

31438030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 31438030 is about 5606.9626358662. The cubic root of 31438030 is about 315.6107408517.

The spelling of 31438030 in words is "thirty-one million, four hundred thirty-eight thousand, thirty".