31485678 has 16 divisors (see below), whose sum is σ = 71967360. Its totient is φ = 8995896.

The previous prime is 31485661. The next prime is 31485721. The reversal of 31485678 is 87658413.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 749659 = 31485678 / (3 + 1 + 4 + 8 + 5 + 6 + 7 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374788 + ... + 374871.

It is an arithmetic number, because the mean of its divisors is an integer number (4497960).

Almost surely, 2^31485678 is an apocalyptic number.

31485678 is an abundant number, since it is smaller than the sum of its proper divisors (40481682).

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

31485678 is a wasteful number, since it uses less digits than its factorization.

31485678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749671.

The product of its digits is 161280, while the sum is 42.

The square root of 31485678 is about 5611.2100299312. The cubic root of 31485678 is about 315.7701086575.

The spelling of 31485678 in words is "thirty-one million, four hundred eighty-five thousand, six hundred seventy-eight".