210140340 has 48 divisors (see below), whose sum is σ = 590009280. Its totient is φ = 55883520.

The previous prime is 210140321. The next prime is 210140347. The reversal of 210140340 is 43041012.

210140340 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210140347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18120 + ... + 27360.

It is an arithmetic number, because the mean of its divisors is an integer number (12291860).

Almost surely, 2^210140340 is an apocalyptic number.

210140340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210140340 is an abundant number, since it is smaller than the sum of its proper divisors (379868940).

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

210140340 is a wasteful number, since it uses less digits than its factorization.

210140340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632 (or 9630 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 210140340 is about 14496.2181274979. The cubic root of 210140340 is about 594.5245737294.

Adding to 210140340 its reverse (43041012), we get a palindrome (253181352).

The spelling of 210140340 in words is "two hundred ten million, one hundred forty thousand, three hundred forty".