611071398 has 64 divisors (see below), whose sum is σ = 1570705920. Its totient is φ = 172479456.

The previous prime is 611071381. The next prime is 611071451. The reversal of 611071398 is 893170116.

611071398 is a `hidden beast` number, since 611 + 0 + 7 + 1 + 39 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21636 + ... + 41112.

It is an arithmetic number, because the mean of its divisors is an integer number (24542280).

Almost surely, 2^611071398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611071398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785352960).

611071398 is an abundant number, since it is smaller than the sum of its proper divisors (959634522).

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

611071398 is a wasteful number, since it uses less digits than its factorization.

611071398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19578 (or 19572 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 611071398 is about 24719.8583733807. The cubic root of 611071398 is about 848.5888456058.

The spelling of 611071398 in words is "six hundred eleven million, seventy-one thousand, three hundred ninety-eight".