780975000 has 384 divisors, whose sum is σ = 2952936000. Its totient is φ = 190080000.

The previous prime is 780974977. The next prime is 780975001. The reversal of 780975000 is 579087.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780975001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8774956 + ... + 8775044.

Almost surely, 2^780975000 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 780975000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1476468000).

780975000 is an abundant number, since it is smaller than the sum of its proper divisors (2171961000).

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

780975000 is a wasteful number, since it uses less digits than its factorization.

780975000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 780975000 is about 27945.9299362179. The cubic root of 780975000 is about 920.8997970540.

The spelling of 780975000 in words is "seven hundred eighty million, nine hundred seventy-five thousand".