400345532 has 12 divisors (see below), whose sum is σ = 723205056. Its totient is φ = 193715520.

The previous prime is 400345511. The next prime is 400345541. The reversal of 400345532 is 235543004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1614173 + ... + 1614420.

It is an arithmetic number, because the mean of its divisors is an integer number (60267088).

Almost surely, 2^400345532 is an apocalyptic number.

It is an amenable number.

400345532 is a deficient number, since it is larger than the sum of its proper divisors (322859524).

400345532 is a wasteful number, since it uses less digits than its factorization.

400345532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228628 (or 3228626 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 400345532 is about 20008.6364352996. The cubic root of 400345532 is about 737.0183971297.

Adding to 400345532 its reverse (235543004), we get a palindrome (635888536).

The spelling of 400345532 in words is "four hundred million, three hundred forty-five thousand, five hundred thirty-two".