87620445 has 24 divisors (see below), whose sum is σ = 165683232. Its totient is φ = 42482400.

The previous prime is 87620443. The next prime is 87620447. The reversal of 87620445 is 54402678.

It is an interprime number because it is at equal distance from previous prime (87620443) and next prime (87620447).

It is not a de Polignac number, because 87620445 - 2¹ = 87620443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87620441) 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 23 ways as a sum of consecutive naturals, for example, 88011 + ... + 89000.

It is an arithmetic number, because the mean of its divisors is an integer number (6903468).

Almost surely, 2^87620445 is an apocalyptic number.

It is an amenable number.

87620445 is a deficient number, since it is larger than the sum of its proper divisors (78062787).

87620445 is a wasteful number, since it uses less digits than its factorization.

87620445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177033 (or 177030 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 87620445 is about 9360.5793089958. The cubic root of 87620445 is about 444.1556095669.

It can be divided in two parts, 876 and 20445, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 87620445 in words is "eighty-seven million, six hundred twenty thousand, four hundred forty-five".