400240575 has 72 divisors (see below), whose sum is σ = 855369360. Its totient is φ = 182952000.

The previous prime is 400240559. The next prime is 400240591. The reversal of 400240575 is 575042004.

It is an interprime number because it is at equal distance from previous prime (400240559) and next prime (400240591).

It is not a de Polignac number, because 400240575 - 2⁴ = 400240559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 27025 + ... + 39125.

It is an arithmetic number, because the mean of its divisors is an integer number (11880130).

Almost surely, 2^400240575 is an apocalyptic number.

400240575 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

400240575 is an abundant number, since it is smaller than the sum of its proper divisors (455128785).

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

400240575 is a wasteful number, since it uses less digits than its factorization.

400240575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12134 (or 12116 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 400240575 is about 20006.0134709542. The cubic root of 400240575 is about 736.9539844373.

Adding to 400240575 its reverse (575042004), we get a palindrome (975282579).

The spelling of 400240575 in words is "four hundred million, two hundred forty thousand, five hundred seventy-five".