1779490040 has 32 divisors (see below), whose sum is σ = 4060251360. Its totient is φ = 701769600.

The previous prime is 1779490021. The next prime is 1779490103. The reversal of 1779490040 is 400949771.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1779490040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310451 + ... + 316130.

It is an arithmetic number, because the mean of its divisors is an integer number (126882855).

Almost surely, 2^1779490040 is an apocalyptic number.

1779490040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1779490040 is an abundant number, since it is smaller than the sum of its proper divisors (2280761320).

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

1779490040 is a wasteful number, since it uses less digits than its factorization.

1779490040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626663 (or 626659 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 1779490040 is about 42184.0021809216. The cubic root of 1779490040 is about 1211.8025271260.

The spelling of 1779490040 in words is "one billion, seven hundred seventy-nine million, four hundred ninety thousand, forty".