1028378012 has 12 divisors (see below), whose sum is σ = 1806160440. Its totient is φ = 512332176.

The previous prime is 1028378009. The next prime is 1028378023. The reversal of 1028378012 is 2108738201.

It is a super-2 number, since 2×1028378012² = 2115122671130144288, 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 1028378012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462962 + ... + 465177.

It is an arithmetic number, because the mean of its divisors is an integer number (150513370).

Almost surely, 2^1028378012 is an apocalyptic number.

It is an amenable number.

1028378012 is a deficient number, since it is larger than the sum of its proper divisors (777782428).

1028378012 is a wasteful number, since it uses less digits than its factorization.

1028378012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928420 (or 928418 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1028378012 is about 32068.3334771235. Note that the first 3 decimals coincide. The cubic root of 1028378012 is about 1009.3712428134.

The spelling of 1028378012 in words is "one billion, twenty-eight million, three hundred seventy-eight thousand, twelve".