623745144 has 64 divisors (see below), whose sum is σ = 1890144000. Its totient is φ = 189012960.

The previous prime is 623745121. The next prime is 623745151. The reversal of 623745144 is 441547326.

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

It is a junction number, because it is equal to n+sod(n) for n = 623745099 and 623745108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128884 + ... + 133635.

It is an arithmetic number, because the mean of its divisors is an integer number (29533500).

Almost surely, 2^623745144 is an apocalyptic number.

It is an amenable number.

623745144 is an abundant number, since it is smaller than the sum of its proper divisors (1266398856).

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

623745144 is a wasteful number, since it uses less digits than its factorization.

623745144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262545 (or 262535 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 623745144 is about 24974.8902700292. The cubic root of 623745144 is about 854.4153836707.

The spelling of 623745144 in words is "six hundred twenty-three million, seven hundred forty-five thousand, one hundred forty-four".