72839090 has 8 divisors (see below), whose sum is σ = 131110380. Its totient is φ = 29135632.

The previous prime is 72839077. The next prime is 72839093. The reversal of 72839090 is 9093827.

It can be written as a sum of positive squares in 2 ways, for example, as 70040161 + 2798929 = 8369^2 + 1673^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (72839093) 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, 3641945 + ... + 3641964.

Almost surely, 2^72839090 is an apocalyptic number.

72839090 is a deficient number, since it is larger than the sum of its proper divisors (58271290).

72839090 is a wasteful number, since it uses less digits than its factorization.

72839090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7283916.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 72839090 is about 8534.5820049959. The cubic root of 72839090 is about 417.6266172670.

The spelling of 72839090 in words is "seventy-two million, eight hundred thirty-nine thousand, ninety".