68329440 has 96 divisors (see below), whose sum is σ = 239168160. Its totient is φ = 18220032.

The previous prime is 68329439. The next prime is 68329441. The reversal of 68329440 is 4492386.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68329439) and next prime (68329441).

It is a tau number, because it is divible by the number of its divisors (96).

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 = 68329395 and 68329404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68329441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3589 + ... + 12228.

It is an arithmetic number, because the mean of its divisors is an integer number (2491335).

Almost surely, 2^68329440 is an apocalyptic number.

68329440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68329440 is an abundant number, since it is smaller than the sum of its proper divisors (170838720).

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

68329440 is a wasteful number, since it uses less digits than its factorization.

68329440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15841 (or 15827 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 68329440 is about 8266.1623502082. The cubic root of 68329440 is about 408.8235958720.

The spelling of 68329440 in words is "sixty-eight million, three hundred twenty-nine thousand, four hundred forty".