400601534 has 16 divisors (see below), whose sum is σ = 648652320. Its totient is φ = 184984800.

The previous prime is 400601521. The next prime is 400601569. The reversal of 400601534 is 435106004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 148817 + ... + 151484.

It is an arithmetic number, because the mean of its divisors is an integer number (40540770).

Almost surely, 2^400601534 is an apocalyptic number.

400601534 is a deficient number, since it is larger than the sum of its proper divisors (248050786).

400601534 is a wasteful number, since it uses less digits than its factorization.

400601534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300355.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 400601534 is about 20015.0327004479. The cubic root of 400601534 is about 737.1754597719.

Adding to 400601534 its reverse (435106004), we get a palindrome (835707538).

The spelling of 400601534 in words is "four hundred million, six hundred one thousand, five hundred thirty-four".