1005557028 has 36 divisors (see below), whose sum is σ = 2729370672. Its totient is φ = 287301840.

The previous prime is 1005557017. The next prime is 1005557041. The reversal of 1005557028 is 8207555001.

It is a happy number.

It is a super-2 number, since 2×1005557028² = 2022289873120385568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1005557028.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 854478 + ... + 855653.

It is an arithmetic number, because the mean of its divisors is an integer number (75815852).

Almost surely, 2^1005557028 is an apocalyptic number.

It is an amenable number.

1005557028 is an abundant number, since it is smaller than the sum of its proper divisors (1723813644).

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

1005557028 is a wasteful number, since it uses less digits than its factorization.

1005557028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710152 (or 1710143 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 1005557028 is about 31710.5192010475. The cubic root of 1005557028 is about 1001.8489220471.

The spelling of 1005557028 in words is "one billion, five million, five hundred fifty-seven thousand, twenty-eight".