87298440 has 32 divisors (see below), whose sum is σ = 261895680. Its totient is φ = 23279552.

The previous prime is 87298433. The next prime is 87298447. The reversal of 87298440 is 4489278.

It is an interprime number because it is at equal distance from previous prime (87298433) and next prime (87298447).

It is a junction number, because it is equal to n+sod(n) for n = 87298392 and 87298401.

It is not an unprimeable number, because it can be changed into a prime (87298447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363624 + ... + 363863.

It is an arithmetic number, because the mean of its divisors is an integer number (8184240).

Almost surely, 2^87298440 is an apocalyptic number.

It is an amenable number.

87298440 is an abundant number, since it is smaller than the sum of its proper divisors (174597240).

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

87298440 is a wasteful number, since it uses less digits than its factorization.

87298440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727501 (or 727497 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 87298440 is about 9343.3634200966. The cubic root of 87298440 is about 443.6108512993.

The spelling of 87298440 in words is "eighty-seven million, two hundred ninety-eight thousand, four hundred forty".