212727540 has 48 divisors (see below), whose sum is σ = 600348672. Its totient is φ = 56278656.

The previous prime is 212727527. The next prime is 212727577. The reversal of 212727540 is 45727212.

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 = 212727498 and 212727507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6339 + ... + 21578.

It is an arithmetic number, because the mean of its divisors is an integer number (12507264).

Almost surely, 2^212727540 is an apocalyptic number.

212727540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212727540 is an abundant number, since it is smaller than the sum of its proper divisors (387621132).

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

212727540 is a wasteful number, since it uses less digits than its factorization.

212727540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28056 (or 28054 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 212727540 is about 14585.1822066096. The cubic root of 212727540 is about 596.9545122731.

The spelling of 212727540 in words is "two hundred twelve million, seven hundred twenty-seven thousand, five hundred forty".