31475420 has 12 divisors (see below), whose sum is σ = 66098424. Its totient is φ = 12590160.

The previous prime is 31475407. The next prime is 31475429. The reversal of 31475420 is 2457413.

It is a self number, because there is not a number n which added to its sum of digits gives 31475420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31475429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786866 + ... + 786905.

It is an arithmetic number, because the mean of its divisors is an integer number (5508202).

Almost surely, 2^31475420 is an apocalyptic number.

It is an amenable number.

31475420 is an abundant number, since it is smaller than the sum of its proper divisors (34623004).

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

31475420 is a wasteful number, since it uses less digits than its factorization.

31475420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573780 (or 1573778 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 31475420 is about 5610.2958923750. The cubic root of 31475420 is about 315.7358124122.

The spelling of 31475420 in words is "thirty-one million, four hundred seventy-five thousand, four hundred twenty".