400523450 has 24 divisors (see below), whose sum is σ = 745612992. Its totient is φ = 160071920.

The previous prime is 400523429. The next prime is 400523507. The reversal of 400523450 is 54325004.

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 71657 + ... + 77043.

It is an arithmetic number, because the mean of its divisors is an integer number (31067208).

Almost surely, 2^400523450 is an apocalyptic number.

400523450 is a deficient number, since it is larger than the sum of its proper divisors (345089542).

400523450 is a wasteful number, since it uses less digits than its factorization.

400523450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6886 (or 6881 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 400523450 is about 20013.0819715505. The cubic root of 400523450 is about 737.1275606801.

Adding to 400523450 its reverse (54325004), we get a palindrome (454848454).

The spelling of 400523450 in words is "four hundred million, five hundred twenty-three thousand, four hundred fifty".