620403494400 has 840 divisors, whose sum is σ = 2440781150544. Its totient is φ = 155669299200.

The previous prime is 620403494387. The next prime is 620403494401. The reversal of 620403494400 is 4494304026.

620403494400 is a `hidden beast` number, since 6 + 204 + 0 + 3 + 4 + 9 + 440 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620403494401) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 158628445 + ... + 158632355.

Almost surely, 2^620403494400 is an apocalyptic number.

620403494400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620403494400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220390575272).

620403494400 is an abundant number, since it is smaller than the sum of its proper divisors (1820377656144).

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

620403494400 is an equidigital number, since it uses as much as digits as its factorization.

620403494400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974 (or 3938 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

Adding to 620403494400 its reverse (4494304026), we get a palindrome (624897798426).

The spelling of 620403494400 in words is "six hundred twenty billion, four hundred three million, four hundred ninety-four thousand, four hundred".