72842870 has 16 divisors (see below), whose sum is σ = 135347328. Its totient is φ = 28197120.

The previous prime is 72842857. The next prime is 72842873. The reversal of 72842870 is 7824827.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72842873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117179 + ... + 117798.

It is an arithmetic number, because the mean of its divisors is an integer number (8459208).

Almost surely, 2^72842870 is an apocalyptic number.

72842870 is a deficient number, since it is larger than the sum of its proper divisors (62504458).

72842870 is a wasteful number, since it uses less digits than its factorization.

72842870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235015.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 72842870 is about 8534.8034540931. The cubic root of 72842870 is about 417.6338414159.

The spelling of 72842870 in words is "seventy-two million, eight hundred forty-two thousand, eight hundred seventy".