68523240 has 64 divisors (see below), whose sum is σ = 206193600. Its totient is φ = 18217472.

The previous prime is 68523239. The next prime is 68523269. The reversal of 68523240 is 4232586.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 68523198 and 68523207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52516 + ... + 53804.

It is an arithmetic number, because the mean of its divisors is an integer number (3221775).

Almost surely, 2^68523240 is an apocalyptic number.

68523240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68523240 is an abundant number, since it is smaller than the sum of its proper divisors (137670360).

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

68523240 is a wasteful number, since it uses less digits than its factorization.

68523240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746 (or 1742 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 68523240 is about 8277.8765393064. The cubic root of 68523240 is about 409.2097409220.

The spelling of 68523240 in words is "sixty-eight million, five hundred twenty-three thousand, two hundred forty".