1028562740 has 24 divisors (see below), whose sum is σ = 2160827592. Its totient is φ = 411264000.

The previous prime is 1028562653. The next prime is 1028562751. The reversal of 1028562740 is 472658201.

It can be written as a sum of positive squares in 4 ways, for example, as 206116 + 1028356624 = 454^2 + 32068^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1028562740.

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, 51452 + ... + 68588.

It is an arithmetic number, because the mean of its divisors is an integer number (90034483).

Almost surely, 2^1028562740 is an apocalyptic number.

1028562740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028562740 is an abundant number, since it is smaller than the sum of its proper divisors (1132264852).

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

1028562740 is a wasteful number, since it uses less digits than its factorization.

1028562740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20147 (or 20145 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1028562740 is about 32071.2135722988. The cubic root of 1028562740 is about 1009.4316771301.

The spelling of 1028562740 in words is "one billion, twenty-eight million, five hundred sixty-two thousand, seven hundred forty".