400136801 has 8 divisors (see below), whose sum is σ = 411961440. Its totient is φ = 388426752.

The previous prime is 400136783. The next prime is 400136899. The reversal of 400136801 is 108631004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400136801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400132801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21536 + ... + 35553.

It is an arithmetic number, because the mean of its divisors is an integer number (51495180).

Almost surely, 2^400136801 is an apocalyptic number.

It is an amenable number.

400136801 is a deficient number, since it is larger than the sum of its proper divisors (11824639).

400136801 is a wasteful number, since it uses less digits than its factorization.

400136801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57295.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 400136801 is about 20003.4197326357. The cubic root of 400136801 is about 736.8902866864.

Adding to 400136801 its reverse (108631004), we get a palindrome (508767805).

The spelling of 400136801 in words is "four hundred million, one hundred thirty-six thousand, eight hundred one".