87235380 has 60 divisors (see below), whose sum is σ = 273665700. Its totient is φ = 23262336.

The previous prime is 87235373. The next prime is 87235387. The reversal of 87235380 is 8353278.

It is an interprime number because it is at equal distance from previous prime (87235373) and next prime (87235387).

It can be written as a sum of positive squares in 2 ways, for example, as 68260644 + 18974736 = 8262^2 + 4356^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×87235380² = 15220023047488800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87235387) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 25305 + ... + 28544.

It is an arithmetic number, because the mean of its divisors is an integer number (4561095).

Almost surely, 2^87235380 is an apocalyptic number.

It is an amenable number.

87235380 is an abundant number, since it is smaller than the sum of its proper divisors (186430320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87235380 is a wasteful number, since it uses less digits than its factorization.

87235380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53870 (or 53859 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 87235380 is about 9339.9882226906. The cubic root of 87235380 is about 443.5040115181.

The spelling of 87235380 in words is "eighty-seven million, two hundred thirty-five thousand, three hundred eighty".