1946768640 has 144 divisors (see below), whose sum is σ = 6320178816. Its totient is φ = 510566400.

The previous prime is 1946768611. The next prime is 1946768669. The reversal of 1946768640 is 468676491.

It is an interprime number because it is at equal distance from previous prime (1946768611) and next prime (1946768669).

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, 230085 + ... + 238395.

Almost surely, 2^1946768640 is an apocalyptic number.

1946768640 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 1946768640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3160089408).

1946768640 is an abundant number, since it is smaller than the sum of its proper divisors (4373410176).

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

1946768640 is an equidigital number, since it uses as much as digits as its factorization.

1946768640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8396 (or 8382 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 1946768640 is about 44122.2012143547. The cubic root of 1946768640 is about 1248.6425028281.

The spelling of 1946768640 in words is "one billion, nine hundred forty-six million, seven hundred sixty-eight thousand, six hundred forty".