354689685 has 120 divisors (see below), whose sum is σ = 754311096. Its totient is φ = 158941440.

The previous prime is 354689677. The next prime is 354689689. The reversal of 354689685 is 586986453.

It is a happy number.

354689685 is a `hidden beast` number, since 3 + 546 + 8 + 96 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 30041361 + 324648324 = 5481^2 + 18018^2 .

It is not a de Polignac number, because 354689685 - 2³ = 354689677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354689689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1210399 + ... + 1210691.

Almost surely, 2^354689685 is an apocalyptic number.

354689685 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

354689685 is an abundant number, since it is smaller than the sum of its proper divisors (399621411).

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

354689685 is a wasteful number, since it uses less digits than its factorization.

354689685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 369 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 354689685 is about 18833.2069759773. The cubic root of 354689685 is about 707.8635006890.

The spelling of 354689685 in words is "three hundred fifty-four million, six hundred eighty-nine thousand, six hundred eighty-five".