428203624 has 8 divisors (see below), whose sum is σ = 802881810. Its totient is φ = 214101808.

The previous prime is 428203613. The next prime is 428203639. The reversal of 428203624 is 426302824.

It can be written as a sum of positive squares in only one way, i.e., 313927524 + 114276100 = 17718^2 + 10690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26762719 + ... + 26762734.

Almost surely, 2^428203624 is an apocalyptic number.

It is an amenable number.

428203624 is a deficient number, since it is larger than the sum of its proper divisors (374678186).

428203624 is a wasteful number, since it uses less digits than its factorization.

428203624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53525459 (or 53525455 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 428203624 is about 20693.0815491555. The cubic root of 428203624 is about 753.7316974875.

The spelling of 428203624 in words is "four hundred twenty-eight million, two hundred three thousand, six hundred twenty-four".