400231016 has 8 divisors (see below), whose sum is σ = 750433170. Its totient is φ = 200115504.

The previous prime is 400231009. The next prime is 400231019. The reversal of 400231016 is 610132004.

It can be written as a sum of positive squares in only one way, i.e., 382202500 + 18028516 = 19550^2 + 4246^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 400230985 and 400231003.

It is not an unprimeable number, because it can be changed into a prime (400231019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25014431 + ... + 25014446.

Almost surely, 2^400231016 is an apocalyptic number.

It is an amenable number.

400231016 is a deficient number, since it is larger than the sum of its proper divisors (350202154).

400231016 is a wasteful number, since it uses less digits than its factorization.

400231016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50028883 (or 50028879 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 400231016 is about 20005.7745663596. The cubic root of 400231016 is about 736.9481174666.

The spelling of 400231016 in words is "four hundred million, two hundred thirty-one thousand, sixteen".