401651789 has 16 divisors (see below), whose sum is σ = 501835776. Its totient is φ = 312303600.

The previous prime is 401651771. The next prime is 401651791. The reversal of 401651789 is 987156104.

It is not a de Polignac number, because 401651789 - 2¹² = 401647693 is a prime.

It is a super-2 number, since 2×401651789² = 322648319213801042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401654789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32144 + ... + 42854.

It is an arithmetic number, because the mean of its divisors is an integer number (31364736).

Almost surely, 2^401651789 is an apocalyptic number.

It is an amenable number.

401651789 is a deficient number, since it is larger than the sum of its proper divisors (100183987).

401651789 is a wasteful number, since it uses less digits than its factorization.

401651789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11216.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 401651789 is about 20041.2521814382. The cubic root of 401651789 is about 737.8191139927.

The spelling of 401651789 in words is "four hundred one million, six hundred fifty-one thousand, seven hundred eighty-nine".