400023242 has 8 divisors (see below), whose sum is σ = 605540100. Its totient is φ = 198176544.

The previous prime is 400023223. The next prime is 400023257. The reversal of 400023242 is 242320004.

It can be written as a sum of positive squares in 2 ways, for example, as 399640081 + 383161 = 19991^2 + 619^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 400023242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 917267 + ... + 917702.

Almost surely, 2^400023242 is an apocalyptic number.

400023242 is a deficient number, since it is larger than the sum of its proper divisors (205516858).

400023242 is a wasteful number, since it uses less digits than its factorization.

400023242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835080.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 400023242 is about 20000.5810415598. The cubic root of 400023242 is about 736.8205701617.

Adding to 400023242 its reverse (242320004), we get a palindrome (642343246).

The spelling of 400023242 in words is "four hundred million, twenty-three thousand, two hundred forty-two".