72230072 has 8 divisors (see below), whose sum is σ = 135431400. Its totient is φ = 36115032.

The previous prime is 72230047. The next prime is 72230113. The reversal of 72230072 is 27003227.

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

It is a super-2 number, since 2×72230072² = 10434366602250368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4514372 + ... + 4514387.

It is an arithmetic number, because the mean of its divisors is an integer number (16928925).

Almost surely, 2^72230072 is an apocalyptic number.

It is an amenable number.

72230072 is a deficient number, since it is larger than the sum of its proper divisors (63201328).

72230072 is a wasteful number, since it uses less digits than its factorization.

72230072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9028765 (or 9028761 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 72230072 is about 8498.8276838632. The cubic root of 72230072 is about 416.4594129450.

Adding to 72230072 its reverse (27003227), we get a palindrome (99233299).

The spelling of 72230072 in words is "seventy-two million, two hundred thirty thousand, seventy-two".