428432550 has 96 divisors (see below), whose sum is σ = 1307749632. Its totient is φ = 90391680.

The previous prime is 428432527. The next prime is 428432567. The reversal of 428432550 is 55234824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2044 + ... + 29343.

It is an arithmetic number, because the mean of its divisors is an integer number (13622392).

Almost surely, 2^428432550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428432550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (653874816).

428432550 is an abundant number, since it is smaller than the sum of its proper divisors (879317082).

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

428432550 is a wasteful number, since it uses less digits than its factorization.

428432550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31422 (or 31417 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 428432550 is about 20698.6122723240. The cubic root of 428432550 is about 753.8659934414.

The spelling of 428432550 in words is "four hundred twenty-eight million, four hundred thirty-two thousand, five hundred fifty".