31380498 has 48 divisors (see below), whose sum is σ = 70506072. Its totient is φ = 10080000.

The previous prime is 31380493. The next prime is 31380511. The reversal of 31380498 is 89408313.

It can be written as a sum of positive squares in 4 ways, for example, as 17114769 + 14265729 = 4137^2 + 3777^2 .

It is not an unprimeable number, because it can be changed into a prime (31380491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74328 + ... + 74748.

Almost surely, 2^31380498 is an apocalyptic number.

31380498 is an abundant number, since it is smaller than the sum of its proper divisors (39125574).

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

31380498 is a wasteful number, since it uses less digits than its factorization.

31380498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 31380498 is about 5601.8298796018. The cubic root of 31380498 is about 315.4180993843.

It can be divided in two parts, 31380 and 498, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 31380498 in words is "thirty-one million, three hundred eighty thousand, four hundred ninety-eight".