31434432 has 56 divisors (see below), whose sum is σ = 84045552. Its totient is φ = 10368000.

The previous prime is 31434427. The next prime is 31434439. The reversal of 31434432 is 23443413.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (31434439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18582 + ... + 20202.

Almost surely, 2^31434432 is an apocalyptic number.

31434432 is a gapful number since it is divisible by the number (32) 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 31434432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42022776).

31434432 is an abundant number, since it is smaller than the sum of its proper divisors (52611120).

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

31434432 is a wasteful number, since it uses less digits than its factorization.

31434432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737 (or 1727 counting only the distinct ones).

The product of its digits is 3456, while the sum is 24.

The square root of 31434432 is about 5606.6417756086. The cubic root of 31434432 is about 315.5987001188.

Adding to 31434432 its reverse (23443413), we get a palindrome (54877845).

The spelling of 31434432 in words is "thirty-one million, four hundred thirty-four thousand, four hundred thirty-two".