781760490 has 64 divisors (see below), whose sum is σ = 2149887744. Its totient is φ = 178219008.

The previous prime is 781760477. The next prime is 781760527. The reversal of 781760490 is 94067187.

It is a super-3 number, since 3×781760490³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78682 + ... + 88058.

It is an arithmetic number, because the mean of its divisors is an integer number (33591996).

Almost surely, 2^781760490 is an apocalyptic number.

781760490 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 781760490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1074943872).

781760490 is an abundant number, since it is smaller than the sum of its proper divisors (1368127254).

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

781760490 is a wasteful number, since it uses less digits than its factorization.

781760490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9791.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 781760490 is about 27959.9801502075. The cubic root of 781760490 is about 921.2084348482.

The spelling of 781760490 in words is "seven hundred eighty-one million, seven hundred sixty thousand, four hundred ninety".