1623640430 has 32 divisors (see below), whose sum is σ = 2949561216. Its totient is φ = 643473664.

The previous prime is 1623640423. The next prime is 1623640441. The reversal of 1623640430 is 340463261.

It is a junction number, because it is equal to n+sod(n) for n = 1623640393 and 1623640402.

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, 1091147 + ... + 1092633.

It is an arithmetic number, because the mean of its divisors is an integer number (92173788).

Almost surely, 2^1623640430 is an apocalyptic number.

1623640430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1623640430 is a deficient number, since it is larger than the sum of its proper divisors (1325920786).

1623640430 is a wasteful number, since it uses less digits than its factorization.

1623640430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 1623640430 is about 40294.4218223813. The cubic root of 1623640430 is about 1175.3393750337.

The spelling of 1623640430 in words is "one billion, six hundred twenty-three million, six hundred forty thousand, four hundred thirty".