72423430 has 16 divisors (see below), whose sum is σ = 133886160. Its totient is φ = 28186272.

The previous prime is 72423427. The next prime is 72423457. The reversal of 72423430 is 3432427.

It is a junction number, because it is equal to n+sod(n) for n = 72423395 and 72423404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97500 + ... + 98239.

It is an arithmetic number, because the mean of its divisors is an integer number (8367885).

Almost surely, 2^72423430 is an apocalyptic number.

72423430 is a deficient number, since it is larger than the sum of its proper divisors (61462730).

72423430 is a wasteful number, since it uses less digits than its factorization.

72423430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195783.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 72423430 is about 8510.1956499249. The cubic root of 72423430 is about 416.8306987936.

Adding to 72423430 its reverse (3432427), we get a palindrome (75855857).

The spelling of 72423430 in words is "seventy-two million, four hundred twenty-three thousand, four hundred thirty".