72543406 has 16 divisors (see below), whose sum is σ = 123354000. Its totient is φ = 31719168.

The previous prime is 72543397. The next prime is 72543407. The reversal of 72543406 is 60434527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72543407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72931 + ... + 73918.

It is an arithmetic number, because the mean of its divisors is an integer number (7709625).

Almost surely, 2^72543406 is an apocalyptic number.

72543406 is a deficient number, since it is larger than the sum of its proper divisors (50810594).

72543406 is a wasteful number, since it uses less digits than its factorization.

72543406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146883.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 72543406 is about 8517.2416896552. The cubic root of 72543406 is about 417.0607444667.

The spelling of 72543406 in words is "seventy-two million, five hundred forty-three thousand, four hundred six".