620744 has 16 divisors (see below), whose sum is σ = 1201920. Its totient is φ = 300240.

The previous prime is 620743. The next prime is 620759. The reversal of 620744 is 447026.

It is a super-2 number, since 2×620744² = 770646227072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (620743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004 + ... + 1499.

It is an arithmetic number, because the mean of its divisors is an integer number (75120).

2⁶²⁰⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

620744 is a deficient number, since it is larger than the sum of its proper divisors (581176).

620744 is a wasteful number, since it uses less digits than its factorization.

620744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540 (or 2536 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 620744 is about 787.8730862265. The cubic root of 620744 is about 85.3042842746.

It can be divided in two parts, 620 and 744, that multiplied together give a triangular number (461280 = T₉₆₀).

The spelling of 620744 in words is "six hundred twenty thousand, seven hundred forty-four".