1138926840 has 64 divisors (see below), whose sum is σ = 3423526560. Its totient is φ = 303114240.

The previous prime is 1138926821. The next prime is 1138926851. The reversal of 1138926840 is 486298311.

It is a junction number, because it is equal to n+sod(n) for n = 1138926792 and 1138926801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53412 + ... + 71628.

Almost surely, 2^1138926840 is an apocalyptic number.

1138926840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138926840 is an abundant number, since it is smaller than the sum of its proper divisors (2284599720).

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

1138926840 is a wasteful number, since it uses less digits than its factorization.

1138926840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18752 (or 18748 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1138926840 is about 33747.9901623786. The cubic root of 1138926840 is about 1044.3160256409.

The spelling of 1138926840 in words is "one billion, one hundred thirty-eight million, nine hundred twenty-six thousand, eight hundred forty".