72210136 has 8 divisors (see below), whose sum is σ = 135394020. Its totient is φ = 36105064.

The previous prime is 72210077. The next prime is 72210137. The reversal of 72210136 is 63101227.

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

It is a super-2 number, since 2×72210136² = 10428607482276992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72210137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4513126 + ... + 4513141.

Almost surely, 2^72210136 is an apocalyptic number.

It is an amenable number.

72210136 is a deficient number, since it is larger than the sum of its proper divisors (63183884).

72210136 is a wasteful number, since it uses less digits than its factorization.

72210136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9026273 (or 9026269 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 72210136 is about 8497.6547352784. The cubic root of 72210136 is about 416.4210941922.

The spelling of 72210136 in words is "seventy-two million, two hundred ten thousand, one hundred thirty-six".