31477404 has 144 divisors (see below), whose sum is σ = 93768192. Its totient is φ = 8160768.

The previous prime is 31477399. The next prime is 31477423. The reversal of 31477404 is 40477413.

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, 469779 + ... + 469845.

It is an arithmetic number, because the mean of its divisors is an integer number (651168).

Almost surely, 2^31477404 is an apocalyptic number.

31477404 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31477404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46884096).

31477404 is an abundant number, since it is smaller than the sum of its proper divisors (62290788).

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

31477404 is a wasteful number, since it uses less digits than its factorization.

31477404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 31477404 is about 5610.4727073572. The cubic root of 31477404 is about 315.7424462309.

Subtracting 31477404 from its reverse (40477413), we obtain a palindrome (9000009).

The spelling of 31477404 in words is "thirty-one million, four hundred seventy-seven thousand, four hundred four".