773491680 has 240 divisors, whose sum is σ = 2940404544. Its totient is φ = 190356480.

The previous prime is 773491639. The next prime is 773491681. The reversal of 773491680 is 86194377.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (773491681) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 166185 + ... + 170775.

Almost surely, 2^773491680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 773491680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470202272).

773491680 is an abundant number, since it is smaller than the sum of its proper divisors (2166912864).

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

773491680 is a wasteful number, since it uses less digits than its factorization.

773491680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631 (or 4614 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 773491680 is about 27811.7183935118. The cubic root of 773491680 is about 917.9489911424.

The spelling of 773491680 in words is "seven hundred seventy-three million, four hundred ninety-one thousand, six hundred eighty".