780828545 has 8 divisors (see below), whose sum is σ = 1070850624. Its totient is φ = 535425264.

The previous prime is 780828539. The next prime is 780828551. The reversal of 780828545 is 545828087.

It is an interprime number because it is at equal distance from previous prime (780828539) and next prime (780828551).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 780828545 - 2⁶ = 780828481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 780828545.

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, 11154659 + ... + 11154728.

It is an arithmetic number, because the mean of its divisors is an integer number (133856328).

Almost surely, 2^780828545 is an apocalyptic number.

It is an amenable number.

780828545 is a deficient number, since it is larger than the sum of its proper divisors (290022079).

780828545 is a wasteful number, since it uses less digits than its factorization.

780828545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22309399.

The product of its (nonzero) digits is 716800, while the sum is 47.

The square root of 780828545 is about 27943.3094854564. The cubic root of 780828545 is about 920.8422284971.

The spelling of 780828545 in words is "seven hundred eighty million, eight hundred twenty-eight thousand, five hundred forty-five".