798528997890 has 80 divisors (see below), whose sum is σ = 2312321607288. Its totient is φ = 196560981504.

The previous prime is 798528997883. The next prime is 798528997901. The reversal of 798528997890 is 98799825897.

798528997890 is a `hidden beast` number, since 7 + 9 + 8 + 528 + 9 + 9 + 7 + 89 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 608601256641 + 189927741249 = 780129^2 + 435807^2 .

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 37906327 + ... + 37927386.

Almost surely, 2^798528997890 is an apocalyptic number.

798528997890 is an abundant number, since it is smaller than the sum of its proper divisors (1513792609398).

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

798528997890 is a wasteful number, since it uses less digits than its factorization.

798528997890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75833745 (or 75833736 counting only the distinct ones).

The product of its (nonzero) digits is 1646023680, while the sum is 81.

The spelling of 798528997890 in words is "seven hundred ninety-eight billion, five hundred twenty-eight million, nine hundred ninety-seven thousand, eight hundred ninety".