898720778 has 8 divisors (see below), whose sum is σ = 1348380768. Its totient is φ = 449260524.

The previous prime is 898720751. The next prime is 898720789. The reversal of 898720778 is 877027898.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38126 + ... + 57017.

It is an arithmetic number, because the mean of its divisors is an integer number (168547596).

Almost surely, 2^898720778 is an apocalyptic number.

898720778 is a deficient number, since it is larger than the sum of its proper divisors (449659990).

898720778 is a wasteful number, since it uses less digits than its factorization.

898720778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99868.

The product of its (nonzero) digits is 3161088, while the sum is 56.

The square root of 898720778 is about 29978.6720519772. The cubic root of 898720778 is about 965.0317324259.

The spelling of 898720778 in words is "eight hundred ninety-eight million, seven hundred twenty thousand, seven hundred seventy-eight".