1977456 has 40 divisors (see below), whose sum is σ = 5503120. Its totient is φ = 608256.

The previous prime is 1977433. The next prime is 1977499. The reversal of 1977456 is 6547791.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 961 + ... + 2208.

It is an arithmetic number, because the mean of its divisors is an integer number (137578).

2^1977456 is an apocalyptic number.

1977456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1977456 is an abundant number, since it is smaller than the sum of its proper divisors (3525664).

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

1977456 is a wasteful number, since it uses less digits than its factorization.

1977456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193 (or 3187 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 1977456 is about 1406.2204663565. The cubic root of 1977456 is about 125.5169207303.

The spelling of 1977456 in words is "one million, nine hundred seventy-seven thousand, four hundred fifty-six".