400354490 has 16 divisors (see below), whose sum is σ = 721598760. Its totient is φ = 159928320.

The previous prime is 400354489. The next prime is 400354519. The reversal of 400354490 is 94453004.

It can be written as a sum of positive squares in 4 ways, for example, as 291965569 + 108388921 = 17087^2 + 10411^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18695 + ... + 33914.

Almost surely, 2^400354490 is an apocalyptic number.

400354490 is a deficient number, since it is larger than the sum of its proper divisors (321244270).

400354490 is a wasteful number, since it uses less digits than its factorization.

400354490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53377.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 400354490 is about 20008.8602873827. The cubic root of 400354490 is about 737.0238941825.

The spelling of 400354490 in words is "four hundred million, three hundred fifty-four thousand, four hundred ninety".