31804080 has 160 divisors (see below), whose sum is σ = 122992128. Its totient is φ = 6604800.

The previous prime is 31804063. The next prime is 31804103. The reversal of 31804080 is 8040813.

It is a super-2 number, since 2×31804080² = 2022999009292800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31804080.

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, 17620 + ... + 19340.

Almost surely, 2^31804080 is an apocalyptic number.

31804080 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 31804080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61496064).

31804080 is an abundant number, since it is smaller than the sum of its proper divisors (91188048).

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

31804080 is a wasteful number, since it uses less digits than its factorization.

31804080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755 (or 1749 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 31804080 is about 5639.5106170660. The cubic root of 31804080 is about 316.8309593762.

Adding to 31804080 its reverse (8040813), we get a palindrome (39844893).

It can be divided in two parts, 3180 and 4080, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 31804080 in words is "thirty-one million, eight hundred four thousand, eighty".