1015128280 has 32 divisors (see below), whose sum is σ = 2307594240. Its totient is φ = 401863680.

The previous prime is 1015128277. The next prime is 1015128287. The reversal of 1015128280 is 828215101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1015128287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126936 + ... + 134695.

It is an arithmetic number, because the mean of its divisors is an integer number (72112320).

Almost surely, 2^1015128280 is an apocalyptic number.

1015128280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1015128280 is an abundant number, since it is smaller than the sum of its proper divisors (1292465960).

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

1015128280 is a wasteful number, since it uses less digits than its factorization.

1015128280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261739 (or 261735 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 1015128280 is about 31861.0778223211. The cubic root of 1015128280 is about 1005.0175421639.

The spelling of 1015128280 in words is "one billion, fifteen million, one hundred twenty-eight thousand, two hundred eighty".