870917440 has 56 divisors (see below), whose sum is σ = 2183038560. Its totient is φ = 330029568.

The previous prime is 870917431. The next prime is 870917447. The reversal of 870917440 is 44719078.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 870917393 and 870917402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870917447) 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 7 ways as a sum of consecutive naturals, for example, 65542 + ... + 77701.

Almost surely, 2^870917440 is an apocalyptic number.

870917440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

870917440 is an abundant number, since it is smaller than the sum of its proper divisors (1312121120).

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

870917440 is a wasteful number, since it uses less digits than its factorization.

870917440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143279 (or 143269 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 870917440 is about 29511.3103741599. The cubic root of 870917440 is about 954.9757182500.

The spelling of 870917440 in words is "eight hundred seventy million, nine hundred seventeen thousand, four hundred forty".