87450320 has 20 divisors (see below), whose sum is σ = 203322180. Its totient is φ = 34980096.

The previous prime is 87450313. The next prime is 87450323. The reversal of 87450320 is 2305478.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59105344 + 28344976 = 7688^2 + 5324^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87450323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546485 + ... + 546644.

It is an arithmetic number, because the mean of its divisors is an integer number (10166109).

Almost surely, 2^87450320 is an apocalyptic number.

87450320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87450320 is an abundant number, since it is smaller than the sum of its proper divisors (115871860).

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

87450320 is a wasteful number, since it uses less digits than its factorization.

87450320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093142 (or 1093136 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 87450320 is about 9351.4875821978. The cubic root of 87450320 is about 443.8679638774.

Adding to 87450320 its reverse (2305478), we get a palindrome (89755798).

The spelling of 87450320 in words is "eighty-seven million, four hundred fifty thousand, three hundred twenty".