72100736 has 16 divisors (see below), whose sum is σ = 143638440. Its totient is φ = 36050304.

The previous prime is 72100733. The next prime is 72100739. The reversal of 72100736 is 63700127.

It is an interprime number because it is at equal distance from previous prime (72100733) and next prime (72100739).

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×72100736² = 10397032263483392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72100733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281516 + ... + 281771.

Almost surely, 2^72100736 is an apocalyptic number.

It is an amenable number.

72100736 is a deficient number, since it is larger than the sum of its proper divisors (71537704).

72100736 is an equidigital number, since it uses as much as digits as its factorization.

72100736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563301 (or 563289 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 72100736 is about 8491.2152251606. The cubic root of 72100736 is about 416.2106920890.

The spelling of 72100736 in words is "seventy-two million, one hundred thousand, seven hundred thirty-six".