31398477 has 8 divisors (see below), whose sum is σ = 45670560. Its totient is φ = 19029360.

The previous prime is 31398467. The next prime is 31398481. The reversal of 31398477 is 77489313.

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

It is not a de Polignac number, because 31398477 - 2¹⁴ = 31382093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31398407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475702 + ... + 475767.

It is an arithmetic number, because the mean of its divisors is an integer number (5708820).

Almost surely, 2^31398477 is an apocalyptic number.

It is an amenable number.

31398477 is a deficient number, since it is larger than the sum of its proper divisors (14272083).

31398477 is a wasteful number, since it uses less digits than its factorization.

31398477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951483.

The product of its digits is 127008, while the sum is 42.

The square root of 31398477 is about 5603.4343932985. The cubic root of 31398477 is about 315.4783259548.

It can be divided in two parts, 313 and 98477, that added together give a triangular number (98790 = T₄₄₄).

The spelling of 31398477 in words is "thirty-one million, three hundred ninety-eight thousand, four hundred seventy-seven".