400342545 has 24 divisors (see below), whose sum is σ = 696586176. Its totient is φ = 212697888.

The previous prime is 400342519. The next prime is 400342561. The reversal of 400342545 is 545243004.

400342545 is a `hidden beast` number, since 400 + 3 + 4 + 254 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-400342545 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5079 + ... + 28748.

It is an arithmetic number, because the mean of its divisors is an integer number (29024424).

Almost surely, 2^400342545 is an apocalyptic number.

400342545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400342545 is a deficient number, since it is larger than the sum of its proper divisors (296243631).

400342545 is a wasteful number, since it uses less digits than its factorization.

400342545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34101 (or 34098 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 400342545 is about 20008.5617923928. The cubic root of 400342545 is about 737.0165641469.

Adding to 400342545 its reverse (545243004), we get a palindrome (945585549).

The spelling of 400342545 in words is "four hundred million, three hundred forty-two thousand, five hundred forty-five".