1623800640 has 336 divisors, whose sum is σ = 6479657856. Its totient is φ = 337244160.

The previous prime is 1623800623. The next prime is 1623800657. The reversal of 1623800640 is 460083261.

1623800640 = T₁₃₉ + T₁₄₀ + ... + T₂₁₃₅.

It is an interprime number because it is at equal distance from previous prime (1623800623) and next prime (1623800657).

It is a tau number, because it is divible by the number of its divisors (336).

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

It is a junction number, because it is equal to n+sod(n) for n = 1623800598 and 1623800607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 812122 + ... + 814118.

It is an arithmetic number, because the mean of its divisors is an integer number (19284696).

Almost surely, 2^1623800640 is an apocalyptic number.

1623800640 is a gapful number since it is divisible by the number (10) 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 1623800640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3239828928).

1623800640 is an abundant number, since it is smaller than the sum of its proper divisors (4855857216).

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

1623800640 is a wasteful number, since it uses less digits than its factorization.

1623800640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046 (or 2025 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1623800640 is about 40296.4097656354. The cubic root of 1623800640 is about 1175.3780319770.

The spelling of 1623800640 in words is "one billion, six hundred twenty-three million, eight hundred thousand, six hundred forty".