68687460 has 96 divisors (see below), whose sum is σ = 214905600. Its totient is φ = 18213120.

The previous prime is 68687393. The next prime is 68687467. The reversal of 68687460 is 6478686.

It is a happy number.

It is a super-2 number, since 2×68687460² = 9435934322503200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (68687467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167736 + ... + 168144.

It is an arithmetic number, because the mean of its divisors is an integer number (2238600).

Almost surely, 2^68687460 is an apocalyptic number.

68687460 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 68687460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107452800).

68687460 is an abundant number, since it is smaller than the sum of its proper divisors (146218140).

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

68687460 is a wasteful number, since it uses less digits than its factorization.

68687460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 68687460 is about 8287.7898139371. The cubic root of 68687460 is about 409.5363785793.

The spelling of 68687460 in words is "sixty-eight million, six hundred eighty-seven thousand, four hundred sixty".