1977090 has 32 divisors (see below), whose sum is σ = 4829760. Its totient is φ = 517824.

The previous prime is 1977089. The next prime is 1977091. The reversal of 1977090 is 907791.

It is an interprime number because it is at equal distance from previous prime (1977089) and next prime (1977091).

It is not an unprimeable number, because it can be changed into a prime (1977091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1212 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (150930).

2^1977090 is an apocalyptic number.

1977090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1977090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2414880).

1977090 is an abundant number, since it is smaller than the sum of its proper divisors (2852670).

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

1977090 is a wasteful number, since it uses less digits than its factorization.

1977090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186.

The product of its (nonzero) digits is 3969, while the sum is 33.

The square root of 1977090 is about 1406.0903242680. The cubic root of 1977090 is about 125.5091764320.

The spelling of 1977090 in words is "one million, nine hundred seventy-seven thousand, ninety".