72123704 has 8 divisors (see below), whose sum is σ = 135231960. Its totient is φ = 36061848.

The previous prime is 72123703. The next prime is 72123757. The reversal of 72123704 is 40732127.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72123703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4507724 + ... + 4507739.

It is an arithmetic number, because the mean of its divisors is an integer number (16903995).

Almost surely, 2^72123704 is an apocalyptic number.

It is an amenable number.

72123704 is a deficient number, since it is larger than the sum of its proper divisors (63108256).

72123704 is a wasteful number, since it uses less digits than its factorization.

72123704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9015469 (or 9015465 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 72123704 is about 8492.5675740615. The cubic root of 72123704 is about 416.2548826332.

It can be divided in two parts, 72123 and 704, that added together give a palindrome (72827).

The spelling of 72123704 in words is "seventy-two million, one hundred twenty-three thousand, seven hundred four".