345688890 has 32 divisors (see below), whose sum is σ = 831081600. Its totient is φ = 92025024.

The previous prime is 345688853. The next prime is 345688921. The reversal of 345688890 is 98886543.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8352 + ... + 27588.

It is an arithmetic number, because the mean of its divisors is an integer number (25971300).

Almost surely, 2^345688890 is an apocalyptic number.

345688890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

345688890 is an abundant number, since it is smaller than the sum of its proper divisors (485392710).

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

345688890 is a wasteful number, since it uses less digits than its factorization.

345688890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19846.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The square root of 345688890 is about 18592.7106684313. The cubic root of 345688890 is about 701.8244177396.

The spelling of 345688890 in words is "three hundred forty-five million, six hundred eighty-eight thousand, eight hundred ninety".