87400440 has 48 divisors (see below), whose sum is σ = 284052600. Its totient is φ = 23306688.

The previous prime is 87400427. The next prime is 87400447. The reversal of 87400440 is 4400478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87400447) 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, 121030 + ... + 121749.

Almost surely, 2^87400440 is an apocalyptic number.

It is an amenable number.

87400440 is an abundant number, since it is smaller than the sum of its proper divisors (196652160).

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

87400440 is a wasteful number, since it uses less digits than its factorization.

87400440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242796 (or 242789 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 87400440 is about 9348.8202464268. The cubic root of 87400440 is about 443.7835565446.

The spelling of 87400440 in words is "eighty-seven million, four hundred thousand, four hundred forty".