68415400 has 24 divisors (see below), whose sum is σ = 159066270. Its totient is φ = 27366080.

The previous prime is 68415377. The next prime is 68415433. The reversal of 68415400 is 451486.

It can be written as a sum of positive squares in 3 ways, for example, as 25826724 + 42588676 = 5082^2 + 6526^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 170839 + ... + 171238.

Almost surely, 2^68415400 is an apocalyptic number.

It is an amenable number.

68415400 is an abundant number, since it is smaller than the sum of its proper divisors (90650870).

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

68415400 is a wasteful number, since it uses less digits than its factorization.

68415400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342093 (or 342084 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 68415400 is about 8271.3602267100. The cubic root of 68415400 is about 408.9949605132.

Adding to 68415400 its reverse (451486), we get a palindrome (68866886).

The spelling of 68415400 in words is "sixty-eight million, four hundred fifteen thousand, four hundred".