778825490 has 16 divisors (see below), whose sum is σ = 1402386048. Its totient is φ = 311419056.

The previous prime is 778825477. The next prime is 778825499. The reversal of 778825490 is 94528877.

It is not an unprimeable number, because it can be changed into a prime (778825499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19319 + ... + 43941.

It is an arithmetic number, because the mean of its divisors is an integer number (87649128).

Almost surely, 2^778825490 is an apocalyptic number.

778825490 is a deficient number, since it is larger than the sum of its proper divisors (623560558).

778825490 is a wasteful number, since it uses less digits than its factorization.

778825490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27793.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 778825490 is about 27907.4450639968. The cubic root of 778825490 is about 920.0541437889.

The spelling of 778825490 in words is "seven hundred seventy-eight million, eight hundred twenty-five thousand, four hundred ninety".