1977954 has 32 divisors (see below), whose sum is σ = 4506624. Its totient is φ = 572880.

The previous prime is 1977953. The next prime is 1977961. The reversal of 1977954 is 4597791.

It is a happy number.

It is a super-2 number, since 2×1977954² = 7824604052232, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1977953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867 + ... + 2169.

It is an arithmetic number, because the mean of its divisors is an integer number (140832).

2^1977954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1977954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2253312).

1977954 is an abundant number, since it is smaller than the sum of its proper divisors (2528670).

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

1977954 is a wasteful number, since it uses less digits than its factorization.

1977954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342.

The product of its digits is 79380, while the sum is 42.

The square root of 1977954 is about 1406.3975255951. The cubic root of 1977954 is about 125.5274565198.

The spelling of 1977954 in words is "one million, nine hundred seventy-seven thousand, nine hundred fifty-four".