400402135 has 8 divisors (see below), whose sum is σ = 549122976. Its totient is φ = 274561440.

The previous prime is 400402127. The next prime is 400402183. The reversal of 400402135 is 531204004.

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

It is not a de Polignac number, because 400402135 - 2³ = 400402127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5719996 + ... + 5720065.

It is an arithmetic number, because the mean of its divisors is an integer number (68640372).

Almost surely, 2^400402135 is an apocalyptic number.

400402135 is a deficient number, since it is larger than the sum of its proper divisors (148720841).

400402135 is a wasteful number, since it uses less digits than its factorization.

400402135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11440073.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 400402135 is about 20010.0508495106. The cubic root of 400402135 is about 737.0531300317.

Adding to 400402135 its reverse (531204004), we get a palindrome (931606139).

The spelling of 400402135 in words is "four hundred million, four hundred two thousand, one hundred thirty-five".