1977150 has 72 divisors (see below), whose sum is σ = 5725080. Its totient is φ = 450240.

The previous prime is 1977139. The next prime is 1977163. The reversal of 1977150 is 517791.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 7216 + ... + 7484.

It is an arithmetic number, because the mean of its divisors is an integer number (79515).

2^1977150 is an apocalyptic number.

1977150 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 1977150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2862540).

1977150 is an abundant number, since it is smaller than the sum of its proper divisors (3747930).

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

1977150 is a wasteful number, since it uses less digits than its factorization.

1977150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 30.

The square root of 1977150 is about 1406.1116598620. Note that the first 3 decimals coincide. The cubic root of 1977150 is about 125.5104460546.

The spelling of 1977150 in words is "one million, nine hundred seventy-seven thousand, one hundred fifty".