428561694 has 24 divisors (see below), whose sum is σ = 1012964472. Its totient is φ = 129867120.

The previous prime is 428561671. The next prime is 428561717. The reversal of 428561694 is 496165824.

428561694 is a `hidden beast` number, since 4 + 28 + 5 + 616 + 9 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (428561671) and next prime (428561717).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1082029 + ... + 1082424.

It is an arithmetic number, because the mean of its divisors is an integer number (42206853).

Almost surely, 2^428561694 is an apocalyptic number.

428561694 is an abundant number, since it is smaller than the sum of its proper divisors (584402778).

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

428561694 is a wasteful number, since it uses less digits than its factorization.

428561694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164472 (or 2164469 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 428561694 is about 20701.7316666988. The cubic root of 428561694 is about 753.9417326985.

The spelling of 428561694 in words is "four hundred twenty-eight million, five hundred sixty-one thousand, six hundred ninety-four".