1438773828 has 24 divisors (see below), whose sum is σ = 3420482688. Its totient is φ = 470542176.

The previous prime is 1438773827. The next prime is 1438773899. The reversal of 1438773828 is 8283778341.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1438773827) 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, 1130476 + ... + 1131747.

It is an arithmetic number, because the mean of its divisors is an integer number (142520112).

Almost surely, 2^1438773828 is an apocalyptic number.

It is an amenable number.

1438773828 is an abundant number, since it is smaller than the sum of its proper divisors (1981708860).

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

1438773828 is a wasteful number, since it uses less digits than its factorization.

1438773828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262283 (or 2262281 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 51.

The square root of 1438773828 is about 37931.1722465837. The cubic root of 1438773828 is about 1128.9226236308.

The spelling of 1438773828 in words is "one billion, four hundred thirty-eight million, seven hundred seventy-three thousand, eight hundred twenty-eight".