1628432040 has 64 divisors (see below), whose sum is σ = 5172672960. Its totient is φ = 408704000.

The previous prime is 1628432033. The next prime is 1628432063. The reversal of 1628432040 is 402348261.

1628432040 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 = 1628431989 and 1628432007.

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, 397086 + ... + 401165.

It is an arithmetic number, because the mean of its divisors is an integer number (80823015).

Almost surely, 2^1628432040 is an apocalyptic number.

1628432040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628432040 is an abundant number, since it is smaller than the sum of its proper divisors (3544240920).

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

1628432040 is a wasteful number, since it uses less digits than its factorization.

1628432040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798282 (or 798278 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1628432040 is about 40353.8355054386. The cubic root of 1628432040 is about 1176.4944413066.

The spelling of 1628432040 in words is "one billion, six hundred twenty-eight million, four hundred thirty-two thousand, forty".