345553780 has 48 divisors (see below), whose sum is σ = 852534144. Its totient is φ = 115989120.

The previous prime is 345553751. The next prime is 345553787. The reversal of 345553780 is 87355543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345553787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57552 + ... + 63271.

It is an arithmetic number, because the mean of its divisors is an integer number (17761128).

Almost surely, 2^345553780 is an apocalyptic number.

It is an amenable number.

345553780 is an abundant number, since it is smaller than the sum of its proper divisors (506980364).

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

345553780 is a wasteful number, since it uses less digits than its factorization.

345553780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120856 (or 120854 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 345553780 is about 18589.0769001583. The cubic root of 345553780 is about 701.7329714940.

The spelling of 345553780 in words is "three hundred forty-five million, five hundred fifty-three thousand, seven hundred eighty".