72326637 has 12 divisors (see below), whose sum is σ = 104635804. Its totient is φ = 48142080.

The previous prime is 72326621. The next prime is 72326641. The reversal of 72326637 is 73662327.

It can be written as a sum of positive squares in 2 ways, for example, as 21261321 + 51065316 = 4611^2 + 7146^2 .

It is not a de Polignac number, because 72326637 - 2⁴ = 72326621 is a prime.

It is a super-2 number, since 2×72326637² = 10462284839459538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72326647) 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 11 ways as a sum of consecutive naturals, for example, 87 + ... + 12027.

Almost surely, 2^72326637 is an apocalyptic number.

It is an amenable number.

72326637 is a deficient number, since it is larger than the sum of its proper divisors (32309167).

72326637 is a wasteful number, since it uses less digits than its factorization.

72326637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12620 (or 12617 counting only the distinct ones).

The product of its digits is 63504, while the sum is 36.

The square root of 72326637 is about 8504.5068640104. The cubic root of 72326637 is about 416.6449196828.

The spelling of 72326637 in words is "seventy-two million, three hundred twenty-six thousand, six hundred thirty-seven".