1628998240 has 48 divisors (see below), whose sum is σ = 3938025168. Its totient is φ = 636443136.

The previous prime is 1628998219. The next prime is 1628998247. The reversal of 1628998240 is 428998261.

It is a super-3 number, since 3×1628998240³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628998247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111507 + ... + 125266.

It is an arithmetic number, because the mean of its divisors is an integer number (82042191).

Almost surely, 2^1628998240 is an apocalyptic number.

1628998240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628998240 is an abundant number, since it is smaller than the sum of its proper divisors (2309026928).

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

1628998240 is a wasteful number, since it uses less digits than its factorization.

1628998240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236831 (or 236823 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 1628998240 is about 40360.8503379203. The cubic root of 1628998240 is about 1176.6307798104.

The spelling of 1628998240 in words is "one billion, six hundred twenty-eight million, nine hundred ninety-eight thousand, two hundred forty".