400260646 has 4 divisors (see below), whose sum is σ = 600390972. Its totient is φ = 200130322.

The previous prime is 400260643. The next prime is 400260659. The reversal of 400260646 is 646062004.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400260643) by changing a digit.

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 as a sum of consecutive naturals, namely, 100065160 + ... + 100065163.

It is an arithmetic number, because the mean of its divisors is an integer number (150097743).

Almost surely, 2^400260646 is an apocalyptic number.

400260646 is a deficient number, since it is larger than the sum of its proper divisors (200130326).

400260646 is a wasteful number, since it uses less digits than its factorization.

400260646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200130325.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 400260646 is about 20006.5150888404. The cubic root of 400260646 is about 736.9663029919.

The spelling of 400260646 in words is "four hundred million, two hundred sixty thousand, six hundred forty-six".