72703810 has 16 divisors (see below), whose sum is σ = 133337016. Its totient is φ = 28532608.

The previous prime is 72703793. The next prime is 72703837. The reversal of 72703810 is 1830727.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 66438801 + 6265009 = 8151^2 + 2503^2 .

It is a super-2 number, since 2×72703810² = 10571687977032200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68059 + ... + 69118.

Almost surely, 2^72703810 is an apocalyptic number.

72703810 is a deficient number, since it is larger than the sum of its proper divisors (60633206).

72703810 is a wasteful number, since it uses less digits than its factorization.

72703810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137237.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 72703810 is about 8526.6529189360. The cubic root of 72703810 is about 417.3679121272.

The spelling of 72703810 in words is "seventy-two million, seven hundred three thousand, eight hundred ten".