68540250 has 32 divisors (see below), whose sum is σ = 171078336. Its totient is φ = 18277200.

The previous prime is 68540231. The next prime is 68540257. The reversal of 68540250 is 5204586.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68540257) 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, 44944 + ... + 46443.

It is an arithmetic number, because the mean of its divisors is an integer number (5346198).

Almost surely, 2^68540250 is an apocalyptic number.

68540250 is an abundant number, since it is smaller than the sum of its proper divisors (102538086).

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

68540250 is a wasteful number, since it uses less digits than its factorization.

68540250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91407 (or 91397 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 68540250 is about 8278.9039129585. The cubic root of 68540250 is about 409.2435984464.

The spelling of 68540250 in words is "sixty-eight million, five hundred forty thousand, two hundred fifty".