1860447040 has 56 divisors (see below), whose sum is σ = 4446864360. Its totient is φ = 741378048.

The previous prime is 1860446993. The next prime is 1860447041. The reversal of 1860447040 is 407440681.

It can be written as a sum of positive squares in 4 ways, for example, as 334450944 + 1525996096 = 18288^2 + 39064^2 .

It is a super-2 number, since 2×1860447040² = 6922526377289523200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1860446987 and 1860447005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1860447041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75274 + ... + 96886.

Almost surely, 2^1860447040 is an apocalyptic number.

1860447040 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 1860447040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2223432180).

1860447040 is an abundant number, since it is smaller than the sum of its proper divisors (2586417320).

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

1860447040 is a wasteful number, since it uses less digits than its factorization.

1860447040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21899 (or 21889 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 1860447040 is about 43132.8997402215. The cubic root of 1860447040 is about 1229.9074643409.

It can be divided in two parts, 1860 and 447040, that added together give a square (448900 = 670²).

The spelling of 1860447040 in words is "one billion, eight hundred sixty million, four hundred forty-seven thousand, forty".