1628622240 has 384 divisors, whose sum is σ = 6258954240. Its totient is φ = 347701248.

The previous prime is 1628622227. The next prime is 1628622271. The reversal of 1628622240 is 422268261.

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, 6192349 + ... + 6192611.

It is an arithmetic number, because the mean of its divisors is an integer number (16299360).

Almost surely, 2^1628622240 is an apocalyptic number.

1628622240 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 1628622240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3129477120).

1628622240 is an abundant number, since it is smaller than the sum of its proper divisors (4630332000).

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

1628622240 is a wasteful number, since it uses less digits than its factorization.

1628622240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 1628622240 is about 40356.1920899383. The cubic root of 1628622240 is about 1176.5402441660.

The spelling of 1628622240 in words is "one billion, six hundred twenty-eight million, six hundred twenty-two thousand, two hundred forty".