428156624 has 80 divisors (see below), whose sum is σ = 987365376. Its totient is φ = 175996800.

The previous prime is 428156623. The next prime is 428156639. The reversal of 428156624 is 426651824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428156623) 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, 440459 + ... + 441429.

Almost surely, 2^428156624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428156624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493682688).

428156624 is an abundant number, since it is smaller than the sum of its proper divisors (559208752).

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

428156624 is a wasteful number, since it uses less digits than its factorization.

428156624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1138 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 428156624 is about 20691.9458727303. The cubic root of 428156624 is about 753.7041197309.

The spelling of 428156624 in words is "four hundred twenty-eight million, one hundred fifty-six thousand, six hundred twenty-four".