400239016 has 16 divisors (see below), whose sum is σ = 774656640. Its totient is φ = 193663920.

The previous prime is 400239013. The next prime is 400239017. The reversal of 400239016 is 610932004.

It is not an unprimeable number, because it can be changed into a prime (400239011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806686 + ... + 807181.

It is an arithmetic number, because the mean of its divisors is an integer number (48416040).

Almost surely, 2^400239016 is an apocalyptic number.

It is an amenable number.

400239016 is a deficient number, since it is larger than the sum of its proper divisors (374417624).

400239016 is a wasteful number, since it uses less digits than its factorization.

400239016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613904 (or 1613900 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 400239016 is about 20005.9745076315. The cubic root of 400239016 is about 736.9530275855.

The spelling of 400239016 in words is "four hundred million, two hundred thirty-nine thousand, sixteen".