72143834 has 16 divisors (see below), whose sum is σ = 123821568. Its totient is φ = 30882192.

The previous prime is 72143807. The next prime is 72143837. The reversal of 72143834 is 43834127.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72143834.

It is not an unprimeable number, because it can be changed into a prime (72143837) 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, 11639 + ... + 16725.

It is an arithmetic number, because the mean of its divisors is an integer number (7738848).

Almost surely, 2^72143834 is an apocalyptic number.

72143834 is a deficient number, since it is larger than the sum of its proper divisors (51677734).

72143834 is a wasteful number, since it uses less digits than its factorization.

72143834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6109.

The product of its digits is 16128, while the sum is 32.

The square root of 72143834 is about 8493.7526453270. The cubic root of 72143834 is about 416.2936051377.

The spelling of 72143834 in words is "seventy-two million, one hundred forty-three thousand, eight hundred thirty-four".