428385944 has 16 divisors (see below), whose sum is σ = 917970000. Its totient is φ = 183593952.

The previous prime is 428385929. The next prime is 428385977. The reversal of 428385944 is 449583824.

It is a super-2 number, since 2×428385944² = 367029034033542272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3824819 + ... + 3824930.

It is an arithmetic number, because the mean of its divisors is an integer number (57373125).

Almost surely, 2^428385944 is an apocalyptic number.

It is an amenable number.

428385944 is an abundant number, since it is smaller than the sum of its proper divisors (489584056).

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

428385944 is a wasteful number, since it uses less digits than its factorization.

428385944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7649762 (or 7649758 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 428385944 is about 20697.4864174373. The cubic root of 428385944 is about 753.8386566198.

The spelling of 428385944 in words is "four hundred twenty-eight million, three hundred eighty-five thousand, nine hundred forty-four".