1772990 has 16 divisors (see below), whose sum is σ = 3223152. Its totient is φ = 702144.

The previous prime is 1772989. The next prime is 1772993. The reversal of 1772990 is 992771.

It is a self number, because there is not a number n which added to its sum of digits gives 1772990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1772993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242 + ... + 1898.

It is an arithmetic number, because the mean of its divisors is an integer number (201447).

2^1772990 is an apocalyptic number.

1772990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1772990 is a deficient number, since it is larger than the sum of its proper divisors (1450162).

1772990 is a wasteful number, since it uses less digits than its factorization.

1772990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 1772990 is about 1331.5367062158. The cubic root of 1772990 is about 121.0325254638.

The spelling of 1772990 in words is "one million, seven hundred seventy-two thousand, nine hundred ninety".