210136940 has 48 divisors (see below), whose sum is σ = 476303520. Its totient is φ = 77414400.

The previous prime is 210136933. The next prime is 210136943. The reversal of 210136940 is 49631012.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (210136943) 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, 199415 + ... + 200465.

It is an arithmetic number, because the mean of its divisors is an integer number (9922990).

Almost surely, 2^210136940 is an apocalyptic number.

210136940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210136940 is an abundant number, since it is smaller than the sum of its proper divisors (266166580).

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

210136940 is a wasteful number, since it uses less digits than its factorization.

210136940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 210136940 is about 14496.1008550575. The cubic root of 210136940 is about 594.5213673096.

Adding to 210136940 its reverse (49631012), we get a palindrome (259767952).

The spelling of 210136940 in words is "two hundred ten million, one hundred thirty-six thousand, nine hundred forty".