212640088 has 8 divisors (see below), whose sum is σ = 398700180. Its totient is φ = 106320040.

The previous prime is 212640041. The next prime is 212640091. The reversal of 212640088 is 880046212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13289998 + ... + 13290013.

Almost surely, 2^212640088 is an apocalyptic number.

It is an amenable number.

212640088 is a deficient number, since it is larger than the sum of its proper divisors (186060092).

212640088 is a wasteful number, since it uses less digits than its factorization.

212640088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26580017 (or 26580013 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 212640088 is about 14582.1839242275. The cubic root of 212640088 is about 596.8726986672.

The spelling of 212640088 in words is "two hundred twelve million, six hundred forty thousand, eighty-eight".