393042478698 has 24 divisors (see below), whose sum is σ = 855410844288. Its totient is φ = 130426650792.

The previous prime is 393042478687. The next prime is 393042478739. The reversal of 393042478698 is 896874240393.

393042478698 is a `hidden beast` number, since 3 + 9 + 30 + 42 + 478 + 6 + 98 = 666.

It is a super-2 number, since 2×393042478698² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48954940 + ... + 48962967.

It is an arithmetic number, because the mean of its divisors is an integer number (35642118512).

Almost surely, 2^393042478698 is an apocalyptic number.

393042478698 is an abundant number, since it is smaller than the sum of its proper divisors (462368365590).

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

393042478698 is a wasteful number, since it uses less digits than its factorization.

393042478698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97918138 (or 97918135 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

Adding to 393042478698 its sum of digits (63), we get a square (393042478761 = 626931²).

The spelling of 393042478698 in words is "three hundred ninety-three billion, forty-two million, four hundred seventy-eight thousand, six hundred ninety-eight".