31366990 has 16 divisors (see below), whose sum is σ = 57526848. Its totient is φ = 12309856.

The previous prime is 31366969. The next prime is 31366991. The reversal of 31366990 is 9966313.

31366990 = T₃₄₈ + T₃₄₉ + ... + T₆₁₂.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31366991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29062 + ... + 30121.

It is an arithmetic number, because the mean of its divisors is an integer number (3595428).

Almost surely, 2^31366990 is an apocalyptic number.

31366990 is a deficient number, since it is larger than the sum of its proper divisors (26159858).

31366990 is a wasteful number, since it uses less digits than its factorization.

31366990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59243.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 31366990 is about 5600.6240723691. The cubic root of 31366990 is about 315.3728347618.

The spelling of 31366990 in words is "thirty-one million, three hundred sixty-six thousand, nine hundred ninety".