1138428798 has 16 divisors (see below), whose sum is σ = 2452000656. Its totient is φ = 350285760.

The previous prime is 1138428773. The next prime is 1138428803. The reversal of 1138428798 is 8978248311.

It is a self number, because there is not a number n which added to its sum of digits gives 1138428798.

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, 7297543 + ... + 7297698.

It is an arithmetic number, because the mean of its divisors is an integer number (153250041).

Almost surely, 2^1138428798 is an apocalyptic number.

1138428798 is an abundant number, since it is smaller than the sum of its proper divisors (1313571858).

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

1138428798 is a wasteful number, since it uses less digits than its factorization.

1138428798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14595259.

The product of its digits is 774144, while the sum is 51.

The square root of 1138428798 is about 33740.6105161125. The cubic root of 1138428798 is about 1044.1637802534.

The spelling of 1138428798 in words is "one billion, one hundred thirty-eight million, four hundred twenty-eight thousand, seven hundred ninety-eight".