1933139840 has 64 divisors (see below), whose sum is σ = 4635642960. Its totient is φ = 770875392.

The previous prime is 1933139839. The next prime is 1933139867. The reversal of 1933139840 is 489313391.

It is a tau number, because it is divible by the number of its divisors (64).

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, 211199 + ... + 220161.

Almost surely, 2^1933139840 is an apocalyptic number.

1933139840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1933139840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2317821480).

1933139840 is an abundant number, since it is smaller than the sum of its proper divisors (2702503120).

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

1933139840 is an equidigital number, since it uses as much as digits as its factorization.

1933139840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319 (or 9307 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1933139840 is about 43967.4861687588. The cubic root of 1933139840 is about 1245.7218740144.

The spelling of 1933139840 in words is "one billion, nine hundred thirty-three million, one hundred thirty-nine thousand, eight hundred forty".