4028891040 has 72 divisors (see below), whose sum is σ = 13748595588. Its totient is φ = 1074370560.

The previous prime is 4028891021. The next prime is 4028891057. The reversal of 4028891040 is 401988204.

It can be written as a sum of positive squares in 2 ways, for example, as 3967488144 + 61402896 = 62988^2 + 7836^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 4028890986 and 4028891004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1397481 + ... + 1400360.

Almost surely, 2^4028891040 is an apocalyptic number.

4028891040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4028891040 is an abundant number, since it is smaller than the sum of its proper divisors (9719704548).

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

4028891040 is a wasteful number, since it uses less digits than its factorization.

4028891040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797862 (or 2797851 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 4028891040 is about 63473.5459857097. The cubic root of 4028891040 is about 1591.2136929922.

It can be divided in two parts, 40288 and 91040, that added together give a triangular number (131328 = T₅₁₂).

The spelling of 4028891040 in words is "four billion, twenty-eight million, eight hundred ninety-one thousand, forty".