428987136 has 72 divisors (see below), whose sum is σ = 1160575024. Its totient is φ = 140636160.

The previous prime is 428987087. The next prime is 428987159. The reversal of 428987136 is 631789824.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42270 + ... + 51426.

Almost surely, 2^428987136 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 428987136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580287512).

428987136 is an abundant number, since it is smaller than the sum of its proper divisors (731587888).

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

428987136 is an equidigital number, since it uses as much as digits as its factorization.

428987136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9237 (or 9223 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 428987136 is about 20712.0046349937. The cubic root of 428987136 is about 754.1911346714.

The spelling of 428987136 in words is "four hundred twenty-eight million, nine hundred eighty-seven thousand, one hundred thirty-six".