1926664740 has 864 divisors, whose sum is σ = 8560790784. Its totient is φ = 338411520.

The previous prime is 1926664717. The next prime is 1926664741. The reversal of 1926664740 is 474666291.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1926664741) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 52072002 + ... + 52072038.

Almost surely, 2^1926664740 is an apocalyptic number.

1926664740 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 1926664740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4280395392).

1926664740 is an abundant number, since it is smaller than the sum of its proper divisors (6634126044).

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

1926664740 is a wasteful number, since it uses less digits than its factorization.

1926664740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1926664740 is about 43893.7893101063. The cubic root of 1926664740 is about 1244.3294594073.

It can be divided in two parts, 1926 and 664740, that added together give a palindrome (666666).

The spelling of 1926664740 in words is "one billion, nine hundred twenty-six million, six hundred sixty-four thousand, seven hundred forty".