1028078149 has 16 divisors (see below), whose sum is σ = 1189738368. Its totient is φ = 870170112.

The previous prime is 1028078137. The next prime is 1028078167. The reversal of 1028078149 is 9418708201.

It is a happy number.

It is not a de Polignac number, because 1028078149 - 2¹⁷ = 1027947077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028078119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250377 + ... + 254449.

It is an arithmetic number, because the mean of its divisors is an integer number (74358648).

Almost surely, 2^1028078149 is an apocalyptic number.

It is an amenable number.

1028078149 is a deficient number, since it is larger than the sum of its proper divisors (161660219).

1028078149 is a wasteful number, since it uses less digits than its factorization.

1028078149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4524.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1028078149 is about 32063.6577607733. The cubic root of 1028078149 is about 1009.2731263267.

The spelling of 1028078149 in words is "one billion, twenty-eight million, seventy-eight thousand, one hundred forty-nine".