616778398 has 8 divisors (see below), whose sum is σ = 926042760. Its totient is φ = 308097480.

The previous prime is 616778347. The next prime is 616778401. The reversal of 616778398 is 893877616.

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

It is a congruent number.

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, 143208 + ... + 147451.

It is an arithmetic number, because the mean of its divisors is an integer number (115755345).

Almost surely, 2^616778398 is an apocalyptic number.

616778398 is a deficient number, since it is larger than the sum of its proper divisors (309264362).

616778398 is a wasteful number, since it uses less digits than its factorization.

616778398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291722.

The product of its digits is 3048192, while the sum is 55.

The square root of 616778398 is about 24835.0236158535. The cubic root of 616778398 is about 851.2224155520. Note that the first 3 decimals are identical.

The spelling of 616778398 in words is "six hundred sixteen million, seven hundred seventy-eight thousand, three hundred ninety-eight".