780486840 has 192 divisors, whose sum is σ = 3006581760. Its totient is φ = 178381440.

The previous prime is 780486821. The next prime is 780486859. The reversal of 780486840 is 48684087.

It is an interprime number because it is at equal distance from previous prime (780486821) and next prime (780486859).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 62305 + ... + 73775.

It is an arithmetic number, because the mean of its divisors is an integer number (15659280).

Almost surely, 2^780486840 is an apocalyptic number.

780486840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780486840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1503290880).

780486840 is an abundant number, since it is smaller than the sum of its proper divisors (2226094920).

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

780486840 is a wasteful number, since it uses less digits than its factorization.

780486840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11504 (or 11488 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 780486840 is about 27937.1945620887. The cubic root of 780486840 is about 920.7078830394.

The spelling of 780486840 in words is "seven hundred eighty million, four hundred eighty-six thousand, eight hundred forty".