31475430 has 96 divisors (see below), whose sum is σ = 95606784. Its totient is φ = 7034688.

The previous prime is 31475429. The next prime is 31475443. The reversal of 31475430 is 3457413.

It is a junction number, because it is equal to n+sod(n) for n = 31475394 and 31475403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29079 + ... + 30141.

It is an arithmetic number, because the mean of its divisors is an integer number (995904).

Almost surely, 2^31475430 is an apocalyptic number.

31475430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31475430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47803392).

31475430 is an abundant number, since it is smaller than the sum of its proper divisors (64131354).

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

31475430 is a wasteful number, since it uses less digits than its factorization.

31475430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 31475430 is about 5610.2967835935. The cubic root of 31475430 is about 315.7358458495.

The spelling of 31475430 in words is "thirty-one million, four hundred seventy-five thousand, four hundred thirty".