31400986 has 8 divisors (see below), whose sum is σ = 47242260. Its totient is φ = 15653568.

The previous prime is 31400983. The next prime is 31401011. The reversal of 31400986 is 68900413.

It can be written as a sum of positive squares in 2 ways, for example, as 26842761 + 4558225 = 5181^2 + 2135^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31400983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22621 + ... + 23968.

Almost surely, 2^31400986 is an apocalyptic number.

31400986 is a deficient number, since it is larger than the sum of its proper divisors (15841274).

31400986 is a wasteful number, since it uses less digits than its factorization.

31400986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46928.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 31400986 is about 5603.6582693808. The cubic root of 31400986 is about 315.4867288469.

The spelling of 31400986 in words is "thirty-one million, four hundred thousand, nine hundred eighty-six".