623553420 has 192 divisors, whose sum is σ = 2088576000. Its totient is φ = 138862080.

The previous prime is 623553409. The next prime is 623553431. The reversal of 623553420 is 24355326.

It is an interprime number because it is at equal distance from previous prime (623553409) and next prime (623553431).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 843411 + ... + 844149.

It is an arithmetic number, because the mean of its divisors is an integer number (10878000).

Almost surely, 2^623553420 is an apocalyptic number.

623553420 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 623553420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044288000).

623553420 is an abundant number, since it is smaller than the sum of its proper divisors (1465022580).

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

623553420 is a wasteful number, since it uses less digits than its factorization.

623553420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 623553420 is about 24971.0516398489. The cubic root of 623553420 is about 854.3278325700.

The spelling of 623553420 in words is "six hundred twenty-three million, five hundred fifty-three thousand, four hundred twenty".