31226040 has 128 divisors (see below), whose sum is σ = 107784000. Its totient is φ = 8031744.

The previous prime is 31226029. The next prime is 31226053. The reversal of 31226040 is 4062213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30822 + ... + 31818.

Almost surely, 2^31226040 is an apocalyptic number.

31226040 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 31226040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53892000).

31226040 is an abundant number, since it is smaller than the sum of its proper divisors (76557960).

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

31226040 is a wasteful number, since it uses less digits than its factorization.

31226040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31226040 is about 5588.0264852629. The cubic root of 31226040 is about 314.8997413355.

Adding to 31226040 its reverse (4062213), we get a palindrome (35288253).

The spelling of 31226040 in words is "thirty-one million, two hundred twenty-six thousand, forty".