1780493490 has 24 divisors (see below), whose sum is σ = 4629283308. Its totient is φ = 474798240.

The previous prime is 1780493467. The next prime is 1780493509. The reversal of 1780493490 is 943940871.

1780493490 is a `hidden beast` number, since 1 + 78 + 0 + 4 + 93 + 490 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1528731801 + 251761689 = 39099^2 + 15867^2 .

It is a super-3 number, since 3×1780493490³ (a number of 29 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9891541 + ... + 9891720.

Almost surely, 2^1780493490 is an apocalyptic number.

1780493490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1780493490 is an abundant number, since it is smaller than the sum of its proper divisors (2848789818).

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

1780493490 is a wasteful number, since it uses less digits than its factorization.

1780493490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19783274 (or 19783271 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1780493490 is about 42195.8942315482. The cubic root of 1780493490 is about 1212.0302618004.

The spelling of 1780493490 in words is "one billion, seven hundred eighty million, four hundred ninety-three thousand, four hundred ninety".