346681440 has 288 divisors, whose sum is σ = 1366799616. Its totient is φ = 78382080.

The previous prime is 346681421. The next prime is 346681469. The reversal of 346681440 is 44186643.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 346681395 and 346681404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1642935 + ... + 1643145.

It is an arithmetic number, because the mean of its divisors is an integer number (4745832).

Almost surely, 2^346681440 is an apocalyptic number.

346681440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 346681440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683399808).

346681440 is an abundant number, since it is smaller than the sum of its proper divisors (1020118176).

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

346681440 is a wasteful number, since it uses less digits than its factorization.

346681440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 346681440 is about 18619.3834484389. The cubic root of 346681440 is about 702.4954741079.

The spelling of 346681440 in words is "three hundred forty-six million, six hundred eighty-one thousand, four hundred forty".