623447269440 has 448 divisors, whose sum is σ = 2121272229888. Its totient is φ = 154863820800.

The previous prime is 623447269421. The next prime is 623447269441. The reversal of 623447269440 is 44962744326.

It is not an unprimeable number, because it can be changed into a prime (623447269441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 85318267 + ... + 85325573.

It is an arithmetic number, because the mean of its divisors is an integer number (4734982656).

Almost surely, 2^623447269440 is an apocalyptic number.

623447269440 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 623447269440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1060636114944).

623447269440 is an abundant number, since it is smaller than the sum of its proper divisors (1497824960448).

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

623447269440 is a wasteful number, since it uses less digits than its factorization.

623447269440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7466 (or 7456 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 51.

The spelling of 623447269440 in words is "six hundred twenty-three billion, four hundred forty-seven million, two hundred sixty-nine thousand, four hundred forty".