620736 has 56 divisors (see below), whose sum is σ = 1700784. Its totient is φ = 199680.

The previous prime is 620731. The next prime is 620743. The reversal of 620736 is 637026.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (620731) by changing a digit.

620736 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10146 + ... + 10206.

2⁶²⁰⁷³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850392).

620736 is an abundant number, since it is smaller than the sum of its proper divisors (1080048).

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

620736 is a wasteful number, since it uses less digits than its factorization.

620736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 620736 is about 787.8680092503. The cubic root of 620736 is about 85.3039178126.

Subtracting 620736 from its reverse (637026), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 620736 in words is "six hundred twenty thousand, seven hundred thirty-six".