72842434 has 16 divisors (see below), whose sum is σ = 125531136. Its totient is φ = 31053600.

The previous prime is 72842431. The next prime is 72842443. The reversal of 72842434 is 43424827.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 72842434.

It is not an unprimeable number, because it can be changed into a prime (72842431) 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, 10947 + ... + 16294.

It is an arithmetic number, because the mean of its divisors is an integer number (7845696).

Almost surely, 2^72842434 is an apocalyptic number.

72842434 is a deficient number, since it is larger than the sum of its proper divisors (52688702).

72842434 is a wasteful number, since it uses less digits than its factorization.

72842434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27441.

The product of its digits is 43008, while the sum is 34.

The square root of 72842434 is about 8534.7779115804. Note that the first 3 decimals coincide. The cubic root of 72842434 is about 417.6330081670.

The spelling of 72842434 in words is "seventy-two million, eight hundred forty-two thousand, four hundred thirty-four".