28518885829590 has 64 divisors (see below), whose sum is σ = 73711076253696. Its totient is φ = 7019964369792.

The previous prime is 28518885829583. The next prime is 28518885829591. The reversal of 28518885829590 is 9592858881582.

It is a happy number.

It is a super-2 number, since 2×28518885829590² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28518885829591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47477707 + ... + 48074633.

It is an arithmetic number, because the mean of its divisors is an integer number (1151735566464).

Almost surely, 2^{28518885829590} is an apocalyptic number.

28518885829590 is an abundant number, since it is smaller than the sum of its proper divisors (45192190424106).

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

28518885829590 is a wasteful number, since it uses less digits than its factorization.

28518885829590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719453.

The product of its (nonzero) digits is 1327104000, while the sum is 78.

The spelling of 28518885829590 in words is "twenty-eight trillion, five hundred eighteen billion, eight hundred eighty-five million, eight hundred twenty-nine thousand, five hundred ninety".