1977406 has 16 divisors (see below), whose sum is σ = 3306960. Its totient is φ = 881280.

The previous prime is 1977403. The next prime is 1977407. The reversal of 1977406 is 6047791.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 885 + ... + 2176.

It is an arithmetic number, because the mean of its divisors is an integer number (206685).

2^1977406 is an apocalyptic number.

1977406 is a deficient number, since it is larger than the sum of its proper divisors (1329554).

1977406 is a wasteful number, since it uses less digits than its factorization.

1977406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1977406 is about 1406.2026880930. The cubic root of 1977406 is about 125.5158628224.

The spelling of 1977406 in words is "one million, nine hundred seventy-seven thousand, four hundred six".