75731406 has 8 divisors (see below), whose sum is σ = 151462824. Its totient is φ = 25243800.

The previous prime is 75731399. The next prime is 75731407. The reversal of 75731406 is 60413757.

It is a sphenic number, since it is the product of 3 distinct primes.

75731406 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75731407) 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, 6310945 + ... + 6310956.

It is an arithmetic number, because the mean of its divisors is an integer number (18932853).

Almost surely, 2^75731406 is an apocalyptic number.

75731406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

75731406 is a wasteful number, since it uses less digits than its factorization.

75731406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12621906.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 75731406 is about 8702.3793298155. The cubic root of 75731406 is about 423.0827708300.

The spelling of 75731406 in words is "seventy-five million, seven hundred thirty-one thousand, four hundred six".