403140240 has 100 divisors (see below), whose sum is σ = 1400188284. Its totient is φ = 107502336.

The previous prime is 403140217. The next prime is 403140247. The reversal of 403140240 is 42041304.

It can be written as a sum of positive squares in 2 ways, for example, as 67371264 + 335768976 = 8208^2 + 18324^2 .

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

It is not an unprimeable number, because it can be changed into a prime (403140247) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24627 + ... + 37586.

Almost surely, 2^403140240 is an apocalyptic number.

403140240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403140240 is an abundant number, since it is smaller than the sum of its proper divisors (997048044).

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

403140240 is a wasteful number, since it uses less digits than its factorization.

403140240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62238 (or 62223 counting only the distinct ones).

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

The square root of 403140240 is about 20078.3525220572. The cubic root of 403140240 is about 738.7293998224.

Adding to 403140240 its reverse (42041304), we get a palindrome (445181544).

The spelling of 403140240 in words is "four hundred three million, one hundred forty thousand, two hundred forty".