428375784 has 48 divisors (see below), whose sum is σ = 1081735200. Its totient is φ = 141366688.

The previous prime is 428375743. The next prime is 428375797. The reversal of 428375784 is 487573824.

428375784 = T₂₇₇₆ + T₂₇₇₇ + ... + T₂₈₈₂.

It is a super-2 number, since 2×428375784² = 367011624635229312, 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 11 ways as a sum of consecutive naturals, for example, 273997 + ... + 275555.

It is an arithmetic number, because the mean of its divisors is an integer number (22536150).

Almost surely, 2^428375784 is an apocalyptic number.

It is an amenable number.

428375784 is an abundant number, since it is smaller than the sum of its proper divisors (653359416).

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

428375784 is a wasteful number, since it uses less digits than its factorization.

428375784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 1671 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 48.

The square root of 428375784 is about 20697.2409755503. The cubic root of 428375784 is about 753.8326969928.

The spelling of 428375784 in words is "four hundred twenty-eight million, three hundred seventy-five thousand, seven hundred eighty-four".