31400470 has 16 divisors (see below), whose sum is σ = 56652768. Its totient is φ = 12530880.

The previous prime is 31400461. The next prime is 31400491. The reversal of 31400470 is 7400413.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1135 + ... + 8005.

It is an arithmetic number, because the mean of its divisors is an integer number (3540798).

Almost surely, 2^31400470 is an apocalyptic number.

31400470 is a deficient number, since it is larger than the sum of its proper divisors (25252298).

31400470 is a wasteful number, since it uses less digits than its factorization.

31400470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 31400470 is about 5603.6122278402. The cubic root of 31400470 is about 315.4850007478.

Adding to 31400470 its reverse (7400413), we get a palindrome (38800883).

The spelling of 31400470 in words is "thirty-one million, four hundred thousand, four hundred seventy".