1428742920 has 64 divisors (see below), whose sum is σ = 4675890240. Its totient is φ = 346361600.

The previous prime is 1428742877. The next prime is 1428742921. The reversal of 1428742920 is 292478241.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1428742921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539871 + ... + 542510.

It is an arithmetic number, because the mean of its divisors is an integer number (73060785).

Almost surely, 2^1428742920 is an apocalyptic number.

1428742920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428742920 is an abundant number, since it is smaller than the sum of its proper divisors (3247147320).

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

1428742920 is a wasteful number, since it uses less digits than its factorization.

1428742920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082406 (or 1082402 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1428742920 is about 37798.7158512032. The cubic root of 1428742920 is about 1126.2929450739.

The spelling of 1428742920 in words is "one billion, four hundred twenty-eight million, seven hundred forty-two thousand, nine hundred twenty".