1620774 has 24 divisors (see below), whose sum is σ = 3544320. Its totient is φ = 535248.

The previous prime is 1620769. The next prime is 1620803. The reversal of 1620774 is 4770261.

1620774 = T₉₂ + T₉₃ + ... + T₂₁₈.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1932 + ... + 2640.

It is an arithmetic number, because the mean of its divisors is an integer number (147680).

2^1620774 is an apocalyptic number.

1620774 is an abundant number, since it is smaller than the sum of its proper divisors (1923546).

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

1620774 is a wasteful number, since it uses less digits than its factorization.

1620774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 1620774 is about 1273.0962257426. The cubic root of 1620774 is about 117.4647306246.

The spelling of 1620774 in words is "one million, six hundred twenty thousand, seven hundred seventy-four".