403239040 has 96 divisors (see below), whose sum is σ = 986026860. Its totient is φ = 157685760.

The previous prime is 403239029. The next prime is 403239119. The reversal of 403239040 is 40932304.

It can be written as a sum of positive squares in 2 ways, for example, as 338854464 + 64384576 = 18408^2 + 8024^2 .

It is a junction number, because it is equal to n+sod(n) for n = 403238996 and 403239014.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2227750 + ... + 2227930.

Almost surely, 2^403239040 is an apocalyptic number.

403239040 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 403239040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493013430).

403239040 is an abundant number, since it is smaller than the sum of its proper divisors (582787820).

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

403239040 is an equidigital number, since it uses as much as digits as its factorization.

403239040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 403239040 is about 20080.8127325564. The cubic root of 403239040 is about 738.7897431768.

The spelling of 403239040 in words is "four hundred three million, two hundred thirty-nine thousand, forty".