31490850 has 24 divisors (see below), whose sum is σ = 78097680. Its totient is φ = 8397520.

The previous prime is 31490821. The next prime is 31490857. The reversal of 31490850 is 5809413.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31490857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104820 + ... + 105119.

It is an arithmetic number, because the mean of its divisors is an integer number (3254070).

Almost surely, 2^31490850 is an apocalyptic number.

31490850 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31490850 is an abundant number, since it is smaller than the sum of its proper divisors (46606830).

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

31490850 is a wasteful number, since it uses less digits than its factorization.

31490850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209954 (or 209949 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 31490850 is about 5611.6708741693. The cubic root of 31490850 is about 315.7873977203.

The spelling of 31490850 in words is "thirty-one million, four hundred ninety thousand, eight hundred fifty".