1946686140 has 144 divisors (see below), whose sum is σ = 6772828608. Its totient is φ = 443354112.

The previous prime is 1946686123. The next prime is 1946686141. The reversal of 1946686140 is 416866491.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1946686141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 366544 + ... + 371816.

It is an arithmetic number, because the mean of its divisors is an integer number (47033532).

Almost surely, 2^1946686140 is an apocalyptic number.

1946686140 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 1946686140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3386414304).

1946686140 is an abundant number, since it is smaller than the sum of its proper divisors (4826142468).

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

1946686140 is a wasteful number, since it uses less digits than its factorization.

1946686140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588 (or 5583 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1946686140 is about 44121.2663009574. The cubic root of 1946686140 is about 1248.6248642895.

The spelling of 1946686140 in words is "one billion, nine hundred forty-six million, six hundred eighty-six thousand, one hundred forty".