72842435 has 4 divisors (see below), whose sum is σ = 87410928. Its totient is φ = 58273944.

The previous prime is 72842431. The next prime is 72842443. The reversal of 72842435 is 53424827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53424827 = 19 ⋅2811833.

It is a cyclic number.

It is not a de Polignac number, because 72842435 - 2² = 72842431 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 72842395 and 72842404.

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 3 ways as a sum of consecutive naturals, for example, 7284239 + ... + 7284248.

It is an arithmetic number, because the mean of its divisors is an integer number (21852732).

Almost surely, 2^72842435 is an apocalyptic number.

72842435 is a deficient number, since it is larger than the sum of its proper divisors (14568493).

72842435 is a wasteful number, since it uses less digits than its factorization.

72842435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14568492.

The product of its digits is 53760, while the sum is 35.

The square root of 72842435 is about 8534.7779701642. Note that the first 3 decimals coincide. The cubic root of 72842435 is about 417.6330100782.

The spelling of 72842435 in words is "seventy-two million, eight hundred forty-two thousand, four hundred thirty-five".