31301040 has 80 divisors (see below), whose sum is σ = 99431136. Its totient is φ = 8140800.

The previous prime is 31301021. The next prime is 31301057. The reversal of 31301040 is 4010313.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 8250 + ... + 11430.

Almost surely, 2^31301040 is an apocalyptic number.

31301040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31301040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49715568).

31301040 is an abundant number, since it is smaller than the sum of its proper divisors (68130096).

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

31301040 is a wasteful number, since it uses less digits than its factorization.

31301040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238 (or 3232 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 31301040 is about 5594.7332376084. The cubic root of 31301040 is about 315.1516528524.

Adding to 31301040 its reverse (4010313), we get a palindrome (35311353).

The spelling of 31301040 in words is "thirty-one million, three hundred one thousand, forty".