401228403654 has 64 divisors (see below), whose sum is σ = 883550324160. Its totient is φ = 121430799360.

The previous prime is 401228403647. The next prime is 401228403683. The reversal of 401228403654 is 456304822104.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 554614 + ... + 1053590.

It is an arithmetic number, because the mean of its divisors is an integer number (13805473815).

Almost surely, 2^401228403654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401228403654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441775162080).

401228403654 is an abundant number, since it is smaller than the sum of its proper divisors (482321920506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401228403654 is a wasteful number, since it uses less digits than its factorization.

401228403654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499082 (or 499056 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 401228403654 in words is "four hundred one billion, two hundred twenty-eight million, four hundred three thousand, six hundred fifty-four".