400145535 has 16 divisors (see below), whose sum is σ = 711370080. Its totient is φ = 213410880.

The previous prime is 400145531. The next prime is 400145539. The reversal of 400145535 is 535541004.

It is an interprime number because it is at equal distance from previous prime (400145531) and next prime (400145539).

It is not a de Polignac number, because 400145535 - 2² = 400145531 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 400145499 and 400145508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400145531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1481886 + ... + 1482155.

It is an arithmetic number, because the mean of its divisors is an integer number (44460630).

Almost surely, 2^400145535 is an apocalyptic number.

400145535 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

400145535 is a deficient number, since it is larger than the sum of its proper divisors (311224545).

400145535 is a wasteful number, since it uses less digits than its factorization.

400145535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2964055 (or 2964049 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 400145535 is about 20003.6380441159. The cubic root of 400145535 is about 736.8956481469.

Adding to 400145535 its reverse (535541004), we get a palindrome (935686539).

The spelling of 400145535 in words is "four hundred million, one hundred forty-five thousand, five hundred thirty-five".