431402040 has 96 divisors (see below), whose sum is σ = 1412452080. Its totient is φ = 114187776.

The previous prime is 431402039. The next prime is 431402071. The reversal of 431402040 is 40204134.

It is a super-2 number, since 2×431402040² = 372215440232323200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44947 + ... + 53693.

Almost surely, 2^431402040 is an apocalyptic number.

431402040 is a gapful number since it is divisible by the number (40) 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 431402040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (706226040).

431402040 is an abundant number, since it is smaller than the sum of its proper divisors (981050040).

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

431402040 is a wasteful number, since it uses less digits than its factorization.

431402040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8901 (or 8894 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 431402040 is about 20770.2200277224. The cubic root of 431402040 is about 755.6036807421.

Adding to 431402040 its reverse (40204134), we get a palindrome (471606174).

The spelling of 431402040 in words is "four hundred thirty-one million, four hundred two thousand, forty".