1428988 has 24 divisors (see below), whose sum is σ = 2790144. Its totient is φ = 634800.

The previous prime is 1428979. The next prime is 1428991. The reversal of 1428988 is 8898241.

It is a self number, because there is not a number n which added to its sum of digits gives 1428988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1723 + ... + 2413.

It is an arithmetic number, because the mean of its divisors is an integer number (116256).

2^1428988 is an apocalyptic number.

It is an amenable number.

1428988 is a deficient number, since it is larger than the sum of its proper divisors (1361156).

1428988 is a wasteful number, since it uses less digits than its factorization.

1428988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 751 counting only the distinct ones).

The product of its digits is 36864, while the sum is 40.

The square root of 1428988 is about 1195.4028609636. The cubic root of 1428988 is about 112.6357341099.

The spelling of 1428988 in words is "one million, four hundred twenty-eight thousand, nine hundred eighty-eight".