87378440 has 16 divisors (see below), whose sum is σ = 196601580. Its totient is φ = 34951360.

The previous prime is 87378439. The next prime is 87378481. The reversal of 87378440 is 4487378.

It can be written as a sum of positive squares in 2 ways, for example, as 81685444 + 5692996 = 9038^2 + 2386^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092191 + ... + 1092270.

Almost surely, 2^87378440 is an apocalyptic number.

It is an amenable number.

87378440 is an abundant number, since it is smaller than the sum of its proper divisors (109223140).

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

87378440 is a wasteful number, since it uses less digits than its factorization.

87378440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184472 (or 2184468 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 87378440 is about 9347.6435533240. The cubic root of 87378440 is about 443.7463177635.

The spelling of 87378440 in words is "eighty-seven million, three hundred seventy-eight thousand, four hundred forty".