31493070 has 128 divisors (see below), whose sum is σ = 101145600. Its totient is φ = 6811776.

The previous prime is 31493069. The next prime is 31493083. The reversal of 31493070 is 7039413.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 35472 + ... + 36348.

It is an arithmetic number, because the mean of its divisors is an integer number (790200).

Almost surely, 2^31493070 is an apocalyptic number.

31493070 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 31493070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50572800).

31493070 is an abundant number, since it is smaller than the sum of its proper divisors (69652530).

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

31493070 is a wasteful number, since it uses less digits than its factorization.

31493070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 31493070 is about 5611.8686727328. The cubic root of 31493070 is about 315.7948181990.

The spelling of 31493070 in words is "thirty-one million, four hundred ninety-three thousand, seventy".