72871810 has 32 divisors (see below), whose sum is σ = 143856000. Its totient is φ = 26357760.

The previous prime is 72871787. The next prime is 72871811. The reversal of 72871810 is 1817827.

It is a super-2 number, since 2×72871810² = 10620601385352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72871811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20226 + ... + 23554.

It is an arithmetic number, because the mean of its divisors is an integer number (4495500).

Almost surely, 2^72871810 is an apocalyptic number.

72871810 is a deficient number, since it is larger than the sum of its proper divisors (70984190).

72871810 is a wasteful number, since it uses less digits than its factorization.

72871810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 72871810 is about 8536.4986967726. The cubic root of 72871810 is about 417.6891418323.

The spelling of 72871810 in words is "seventy-two million, eight hundred seventy-one thousand, eight hundred ten".