398470776 has 128 divisors (see below), whose sum is σ = 1132185600. Its totient is φ = 115776000.

The previous prime is 398470771. The next prime is 398470777. The reversal of 398470776 is 677074893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398470771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1481170 + ... + 1481438.

It is an arithmetic number, because the mean of its divisors is an integer number (8845200).

Almost surely, 2^398470776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398470776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566092800).

398470776 is an abundant number, since it is smaller than the sum of its proper divisors (733714824).

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

398470776 is a wasteful number, since it uses less digits than its factorization.

398470776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 51.

The square root of 398470776 is about 19961.7327905170. The cubic root of 398470776 is about 735.8661490601.

It can be divided in two parts, 398 and 470776, that added together give a palindrome (471174).

The spelling of 398470776 in words is "three hundred ninety-eight million, four hundred seventy thousand, seven hundred seventy-six".