1780081240 has 32 divisors (see below), whose sum is σ = 4577352480. Its totient is φ = 610313472.

The previous prime is 1780081181. The next prime is 1780081249. The reversal of 1780081240 is 421800871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1780081249) 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, 3178437 + ... + 3178996.

It is an arithmetic number, because the mean of its divisors is an integer number (143042265).

Almost surely, 2^1780081240 is an apocalyptic number.

1780081240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1780081240 is an abundant number, since it is smaller than the sum of its proper divisors (2797271240).

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

1780081240 is a wasteful number, since it uses less digits than its factorization.

1780081240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6357451 (or 6357447 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 1780081240 is about 42191.0089948084. The cubic root of 1780081240 is about 1211.9367113238.

The spelling of 1780081240 in words is "one billion, seven hundred eighty million, eighty-one thousand, two hundred forty".