400240332 has 24 divisors (see below), whose sum is σ = 1037660400. Its totient is φ = 133413408.

The previous prime is 400240331. The next prime is 400240361. The reversal of 400240332 is 233042004.

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 (400240331) 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, 1852857 + ... + 1853072.

It is an arithmetic number, because the mean of its divisors is an integer number (43235850).

Almost surely, 2^400240332 is an apocalyptic number.

It is an amenable number.

400240332 is an abundant number, since it is smaller than the sum of its proper divisors (637420068).

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

400240332 is a wasteful number, since it uses less digits than its factorization.

400240332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3705942 (or 3705934 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 400240332 is about 20006.0073977793. The cubic root of 400240332 is about 736.9538352938.

Adding to 400240332 its reverse (233042004), we get a palindrome (633282336).

The spelling of 400240332 in words is "four hundred million, two hundred forty thousand, three hundred thirty-two".