31469904 has 80 divisors (see below), whose sum is σ = 91383040. Its totient is φ = 10368000.

The previous prime is 31469903. The next prime is 31469923. The reversal of 31469904 is 40996413.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31469903) 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, 41529 + ... + 42279.

It is an arithmetic number, because the mean of its divisors is an integer number (1142288).

Almost surely, 2^31469904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31469904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45691520).

31469904 is an abundant number, since it is smaller than the sum of its proper divisors (59913136).

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

31469904 is a wasteful number, since it uses less digits than its factorization.

31469904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 31469904 is about 5609.8042746606. The cubic root of 31469904 is about 315.7173673262.

The spelling of 31469904 in words is "thirty-one million, four hundred sixty-nine thousand, nine hundred four".