1928638023 has 32 divisors (see below), whose sum is σ = 2810056704. Its totient is φ = 1169517312.

The previous prime is 1928638013. The next prime is 1928638051. The reversal of 1928638023 is 3208368291.

It is not a de Polignac number, because 1928638023 - 2⁴ = 1928638007 is a prime.

It is a super-2 number, since 2×1928638023² = 7439289247522697058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928638013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 894715 + ... + 896867.

It is an arithmetic number, because the mean of its divisors is an integer number (87814272).

Almost surely, 2^1928638023 is an apocalyptic number.

1928638023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1928638023 is a deficient number, since it is larger than the sum of its proper divisors (881418681).

1928638023 is a wasteful number, since it uses less digits than its factorization.

1928638023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1928638023 is about 43916.2614870619. The cubic root of 1928638023 is about 1244.7541270240.

The spelling of 1928638023 in words is "one billion, nine hundred twenty-eight million, six hundred thirty-eight thousand, twenty-three".