1628242780 has 24 divisors (see below), whose sum is σ = 3426746400. Its totient is φ = 649880640.

The previous prime is 1628242771. The next prime is 1628242817. The reversal of 1628242780 is 872428261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79080 + ... + 97519.

It is an arithmetic number, because the mean of its divisors is an integer number (142781100).

Almost surely, 2^1628242780 is an apocalyptic number.

1628242780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628242780 is an abundant number, since it is smaller than the sum of its proper divisors (1798503620).

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

1628242780 is a wasteful number, since it uses less digits than its factorization.

1628242780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177069 (or 177067 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 1628242780 is about 40351.4904309618. The cubic root of 1628242780 is about 1176.4488612723.

The spelling of 1628242780 in words is "one billion, six hundred twenty-eight million, two hundred forty-two thousand, seven hundred eighty".