31423038 has 32 divisors (see below), whose sum is σ = 67495680. Its totient is φ = 9717120.

The previous prime is 31423033. The next prime is 31423039. The reversal of 31423038 is 83032413.

It is a junction number, because it is equal to n+sod(n) for n = 31422999 and 31423017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5073 + ... + 9411.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^31423038 is an apocalyptic number.

31423038 is an abundant number, since it is smaller than the sum of its proper divisors (36072642).

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

31423038 is a wasteful number, since it uses less digits than its factorization.

31423038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 31423038 is about 5605.6255672315. The cubic root of 31423038 is about 315.5605639529.

The spelling of 31423038 in words is "thirty-one million, four hundred twenty-three thousand, thirty-eight".