72143406 has 16 divisors (see below), whose sum is σ = 160318800. Its totient is φ = 24047784.

The previous prime is 72143369. The next prime is 72143411. The reversal of 72143406 is 60434127.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 72143406.

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, 667941 + ... + 668048.

It is an arithmetic number, because the mean of its divisors is an integer number (10019925).

Almost surely, 2^72143406 is an apocalyptic number.

72143406 is an abundant number, since it is smaller than the sum of its proper divisors (88175394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72143406 is a wasteful number, since it uses less digits than its factorization.

72143406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336000 (or 1335994 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 72143406 is about 8493.7274503012. The cubic root of 72143406 is about 416.2927819026.

The spelling of 72143406 in words is "seventy-two million, one hundred forty-three thousand, four hundred six".