398678405616 has 30 divisors (see below), whose sum is σ = 1115745816120. Its totient is φ = 132892801824.

The previous prime is 398678405569. The next prime is 398678405659. The reversal of 398678405616 is 616504876893.

398678405616 is a `hidden beast` number, since 3 + 9 + 8 + 6 + 7 + 8 + 4 + 0 + 5 + 616 = 666.

It is a super-2 number, since 2×398678405616² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1384299876 + ... + 1384300163.

It is an arithmetic number, because the mean of its divisors is an integer number (37191527204).

Almost surely, 2^398678405616 is an apocalyptic number.

398678405616 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

398678405616 is an abundant number, since it is smaller than the sum of its proper divisors (717067410504).

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

398678405616 is a wasteful number, since it uses less digits than its factorization.

398678405616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768600053 (or 2768600044 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 398678405616 in words is "three hundred ninety-eight billion, six hundred seventy-eight million, four hundred five thousand, six hundred sixteen".