345552690 has 128 divisors (see below), whose sum is σ = 1023528960. Its totient is φ = 72914688.

The previous prime is 345552689. The next prime is 345552721. The reversal of 345552690 is 96255543.

It is a super-2 number, since 2×345552690² = 238813323132472200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138837 + ... + 141303.

It is an arithmetic number, because the mean of its divisors is an integer number (7996320).

Almost surely, 2^345552690 is an apocalyptic number.

345552690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 345552690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511764480).

345552690 is an abundant number, since it is smaller than the sum of its proper divisors (677976270).

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

345552690 is a wasteful number, since it uses less digits than its factorization.

345552690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 345552690 is about 18589.0475818424. The cubic root of 345552690 is about 701.7322336544.

The spelling of 345552690 in words is "three hundred forty-five million, five hundred fifty-two thousand, six hundred ninety".