31049430 has 64 divisors (see below), whose sum is σ = 78148800. Its totient is φ = 7884800.

The previous prime is 31049411. The next prime is 31049437. The reversal of 31049430 is 3494013.

It is a self number, because there is not a number n which added to its sum of digits gives 31049430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31049437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77230 + ... + 77630.

It is an arithmetic number, because the mean of its divisors is an integer number (1221075).

Almost surely, 2^31049430 is an apocalyptic number.

31049430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31049430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39074400).

31049430 is an abundant number, since it is smaller than the sum of its proper divisors (47099370).

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

31049430 is a wasteful number, since it uses less digits than its factorization.

31049430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31049430 is about 5572.2015397866. The cubic root of 31049430 is about 314.3049426449.

The spelling of 31049430 in words is "thirty-one million, forty-nine thousand, four hundred thirty".