68131624 has 16 divisors (see below), whose sum is σ = 139360320. Its totient is φ = 30968880.

The previous prime is 68131621. The next prime is 68131633. The reversal of 68131624 is 42613186.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68131621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387024 + ... + 387199.

It is an arithmetic number, because the mean of its divisors is an integer number (8710020).

Almost surely, 2^68131624 is an apocalyptic number.

It is an amenable number.

68131624 is an abundant number, since it is smaller than the sum of its proper divisors (71228696).

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

68131624 is a wasteful number, since it uses less digits than its factorization.

68131624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774240 (or 774236 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 68131624 is about 8254.1882702056. The cubic root of 68131624 is about 408.4286952434.

The spelling of 68131624 in words is "sixty-eight million, one hundred thirty-one thousand, six hundred twenty-four".