428507650 has 48 divisors (see below), whose sum is σ = 820614888. Its totient is φ = 166400000.

The previous prime is 428507561. The next prime is 428507659. The reversal of 428507650 is 56705824.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 313396209 + 115111441 = 17703^2 + 10729^2 .

It is a super-2 number, since 2×428507650² = 367237612217045000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428507659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266850 + ... + 268450.

Almost surely, 2^428507650 is an apocalyptic number.

428507650 is a deficient number, since it is larger than the sum of its proper divisors (392107238).

428507650 is a wasteful number, since it uses less digits than its factorization.

428507650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767 (or 1762 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 428507650 is about 20700.4263241123. The cubic root of 428507650 is about 753.9100392921.

The spelling of 428507650 in words is "four hundred twenty-eight million, five hundred seven thousand, six hundred fifty".