403240144 has 10 divisors (see below), whose sum is σ = 781277810. Its totient is φ = 201620064.

The previous prime is 403240121. The next prime is 403240147. The reversal of 403240144 is 441042304.

It can be written as a sum of positive squares in only one way, i.e., 337824400 + 65415744 = 18380^2 + 8088^2 .

It is a super-2 number, since 2×403240144² = 325205227466281472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403240147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12601239 + ... + 12601270.

It is an arithmetic number, because the mean of its divisors is an integer number (78127781).

Almost surely, 2^403240144 is an apocalyptic number.

It is an amenable number.

403240144 is a deficient number, since it is larger than the sum of its proper divisors (378037666).

403240144 is a wasteful number, since it uses less digits than its factorization.

403240144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25202517 (or 25202511 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 403240144 is about 20080.8402214648. The cubic root of 403240144 is about 738.7904174031.

Adding to 403240144 its reverse (441042304), we get a palindrome (844282448).

The spelling of 403240144 in words is "four hundred three million, two hundred forty thousand, one hundred forty-four".