31403966 has 8 divisors (see below), whose sum is σ = 51388344. Its totient is φ = 14274520.

The previous prime is 31403921. The next prime is 31403969. The reversal of 31403966 is 66930413.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713705 + ... + 713748.

It is an arithmetic number, because the mean of its divisors is an integer number (6423543).

Almost surely, 2^31403966 is an apocalyptic number.

31403966 is a deficient number, since it is larger than the sum of its proper divisors (19984378).

31403966 is a wasteful number, since it uses less digits than its factorization.

31403966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427466.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 31403966 is about 5603.9241608002. The cubic root of 31403966 is about 315.4967085835.

The spelling of 31403966 in words is "thirty-one million, four hundred three thousand, nine hundred sixty-six".