400426766 has 8 divisors (see below), whose sum is σ = 611973144. Its totient is φ = 196435720.

The previous prime is 400426679. The next prime is 400426769. The reversal of 400426766 is 667624004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400426769) 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, 1888700 + ... + 1888911.

It is an arithmetic number, because the mean of its divisors is an integer number (76496643).

Almost surely, 2^400426766 is an apocalyptic number.

400426766 is a deficient number, since it is larger than the sum of its proper divisors (211546378).

400426766 is a wasteful number, since it uses less digits than its factorization.

400426766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777666.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 400426766 is about 20010.6663057480. Note that the first 3 decimals coincide. The cubic root of 400426766 is about 737.0682431575.

The spelling of 400426766 in words is "four hundred million, four hundred twenty-six thousand, seven hundred sixty-six".