68414640 has 160 divisors (see below), whose sum is σ = 244793856. Its totient is φ = 15482880.

The previous prime is 68414629. The next prime is 68414653. The reversal of 68414640 is 4641486.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324135 + ... + 324345.

Almost surely, 2^68414640 is an apocalyptic number.

68414640 is a gapful number since it is divisible by the number (60) 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 68414640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122396928).

68414640 is an abundant number, since it is smaller than the sum of its proper divisors (176379216).

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

68414640 is a wasteful number, since it uses less digits than its factorization.

68414640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 68414640 is about 8271.3142849247. The cubic root of 68414640 is about 408.9934460524.

The spelling of 68414640 in words is "sixty-eight million, four hundred fourteen thousand, six hundred forty".