210320040 has 128 divisors (see below), whose sum is σ = 724930560. Its totient is φ = 47817984.

The previous prime is 210320023. The next prime is 210320051. The reversal of 210320040 is 40023012.

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

It is a junction number, because it is equal to n+sod(n) for n = 210319998 and 210320025.

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, 190129 + ... + 191231.

It is an arithmetic number, because the mean of its divisors is an integer number (5663520).

Almost surely, 2^210320040 is an apocalyptic number.

210320040 is a gapful number since it is divisible by the number (20) 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 210320040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362465280).

210320040 is an abundant number, since it is smaller than the sum of its proper divisors (514610520).

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

210320040 is a wasteful number, since it uses less digits than its factorization.

210320040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351 (or 1347 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 210320040 is about 14502.4149713074. The cubic root of 210320040 is about 594.6939932500.

Adding to 210320040 its reverse (40023012), we get a palindrome (250343052).

The spelling of 210320040 in words is "two hundred ten million, three hundred twenty thousand, forty".