28358628040 has 32 divisors (see below), whose sum is σ = 63910383480. Its totient is φ = 11325056512.

The previous prime is 28358627987. The next prime is 28358628139. The reversal of 28358628040 is 4082685382.

It can be written as a sum of positive squares in 4 ways, for example, as 6591166596 + 21767461444 = 81186^2 + 147538^2 .

It is a super-2 number, since 2×28358628040² (a number of 22 digits) contains 22 as substring.

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, 549847 + ... + 599206.

Almost surely, 2^28358628040 is an apocalyptic number.

28358628040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28358628040 is an abundant number, since it is smaller than the sum of its proper divisors (35551755440).

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

28358628040 is a wasteful number, since it uses less digits than its factorization.

28358628040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149681 (or 1149677 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 46.

The spelling of 28358628040 in words is "twenty-eight billion, three hundred fifty-eight million, six hundred twenty-eight thousand, forty".