354689680 has 20 divisors (see below), whose sum is σ = 824653692. Its totient is φ = 141875840.

The previous prime is 354689677. The next prime is 354689689. The reversal of 354689680 is 86986453.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51093904 + 303595776 = 7148^2 + 17424^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2216731 + ... + 2216890.

Almost surely, 2^354689680 is an apocalyptic number.

It is an amenable number.

354689680 is an abundant number, since it is smaller than the sum of its proper divisors (469964012).

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

354689680 is a wasteful number, since it uses less digits than its factorization.

354689680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433634 (or 4433628 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 354689680 is about 18833.2068432330. The cubic root of 354689680 is about 707.8634973627.

The spelling of 354689680 in words is "three hundred fifty-four million, six hundred eighty-nine thousand, six hundred eighty".