68644400 has 60 divisors (see below), whose sum is σ = 179922264. Its totient is φ = 24960000.

The previous prime is 68644399. The next prime is 68644409. The reversal of 68644400 is 444686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68644409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3401 + ... + 12200.

Almost surely, 2^68644400 is an apocalyptic number.

It is an amenable number.

68644400 is an abundant number, since it is smaller than the sum of its proper divisors (111277864).

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

68644400 is a wasteful number, since it uses less digits than its factorization.

68644400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15630 (or 15619 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 68644400 is about 8285.1916091301. The cubic root of 68644400 is about 409.4507815732.

It can be divided in two parts, 68644 and 400, that multiplied together give a square (27457600 = 5240²).

The spelling of 68644400 in words is "sixty-eight million, six hundred forty-four thousand, four hundred".