400049604 has 30 divisors (see below), whose sum is σ = 1045809534. Its totient is φ = 133349760.

The previous prime is 400049581. The next prime is 400049609. The reversal of 400049604 is 406940004.

It can be written as a sum of positive squares in only one way, i.e., 399920004 + 129600 = 19998^2 + 360^2 .

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

It is not an unprimeable number, because it can be changed into a prime (400049609) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 617037 + ... + 617684.

Almost surely, 2^400049604 is an apocalyptic number.

It is an amenable number.

400049604 is an abundant number, since it is smaller than the sum of its proper divisors (645759930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400049604 is a wasteful number, since it uses less digits than its factorization.

400049604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234737 (or 1234726 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 400049604 is about 20001.2400615562. The cubic root of 400049604 is about 736.8367555856.

Adding to 400049604 its reverse (406940004), we get a palindrome (806989608).

The spelling of 400049604 in words is "four hundred million, forty-nine thousand, six hundred four".