68031405 has 24 divisors (see below), whose sum is σ = 126993048. Its totient is φ = 33492096.

The previous prime is 68031373. The next prime is 68031421. The reversal of 68031405 is 50413086.

It can be written as a sum of positive squares in 4 ways, for example, as 2518569 + 65512836 = 1587^2 + 8094^2 .

It is not a de Polignac number, because 68031405 - 2⁵ = 68031373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57562 + ... + 58731.

It is an arithmetic number, because the mean of its divisors is an integer number (5291377).

Almost surely, 2^68031405 is an apocalyptic number.

68031405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68031405 is a deficient number, since it is larger than the sum of its proper divisors (58961643).

68031405 is a wasteful number, since it uses less digits than its factorization.

68031405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116317 (or 116314 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 68031405 is about 8248.1152392531. The cubic root of 68031405 is about 408.2283360006.

The spelling of 68031405 in words is "sixty-eight million, thirty-one thousand, four hundred five".