840478760 has 32 divisors (see below), whose sum is σ = 2062994400. Its totient is φ = 305628480.

The previous prime is 840478739. The next prime is 840478781. The reversal of 840478760 is 67874048.

It is an interprime number because it is at equal distance from previous prime (840478739) and next prime (840478781).

It is a super-2 number, since 2×840478760² = 1412809092022275200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954650 + ... + 955529.

It is an arithmetic number, because the mean of its divisors is an integer number (64468575).

Almost surely, 2^840478760 is an apocalyptic number.

It is an amenable number.

840478760 is an abundant number, since it is smaller than the sum of its proper divisors (1222515640).

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

840478760 is a wasteful number, since it uses less digits than its factorization.

840478760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910201 (or 1910197 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 840478760 is about 28991.0117105285. The cubic root of 840478760 is about 943.7180194125.

The spelling of 840478760 in words is "eight hundred forty million, four hundred seventy-eight thousand, seven hundred sixty".