68257405 has 16 divisors (see below), whose sum is σ = 86572800. Its totient is φ = 51520320.

The previous prime is 68257403. The next prime is 68257411. The reversal of 68257405 is 50475286.

It is a happy number.

It is not a de Polignac number, because 68257405 - 2¹ = 68257403 is a prime.

It is a super-3 number, since 3×68257405³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68257403) 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, 24220 + ... + 26890.

It is an arithmetic number, because the mean of its divisors is an integer number (5410800).

Almost surely, 2^68257405 is an apocalyptic number.

It is an amenable number.

68257405 is a deficient number, since it is larger than the sum of its proper divisors (18315395).

68257405 is a wasteful number, since it uses less digits than its factorization.

68257405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 68257405 is about 8261.8039797613. The cubic root of 68257405 is about 408.6798805487.

The spelling of 68257405 in words is "sixty-eight million, two hundred fifty-seven thousand, four hundred five".