31794240 has 56 divisors (see below), whose sum is σ = 100949760. Its totient is φ = 8478208.

The previous prime is 31794221. The next prime is 31794281. The reversal of 31794240 is 4249713.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 31794198 and 31794207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15600 + ... + 17519.

Almost surely, 2^31794240 is an apocalyptic number.

31794240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31794240 is an abundant number, since it is smaller than the sum of its proper divisors (69155520).

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

31794240 is a wasteful number, since it uses less digits than its factorization.

31794240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33139 (or 33129 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 31794240 is about 5638.6381334503. The cubic root of 31794240 is about 316.7982807783.

The spelling of 31794240 in words is "thirty-one million, seven hundred ninety-four thousand, two hundred forty".