28978952740 has 12 divisors (see below), whose sum is σ = 60855800796. Its totient is φ = 11591581088.

The previous prime is 28978952713. The next prime is 28978952767. The reversal of 28978952740 is 4725987982.

It is an interprime number because it is at equal distance from previous prime (28978952713) and next prime (28978952767).

It can be written as a sum of positive squares in 2 ways, for example, as 12271322176 + 16707630564 = 110776^2 + 129258^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724473799 + ... + 724473838.

It is an arithmetic number, because the mean of its divisors is an integer number (5071316733).

Almost surely, 2^28978952740 is an apocalyptic number.

28978952740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28978952740 is an abundant number, since it is smaller than the sum of its proper divisors (31876848056).

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

28978952740 is a wasteful number, since it uses less digits than its factorization.

28978952740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448947646 (or 1448947644 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 28978952740 in words is "twenty-eight billion, nine hundred seventy-eight million, nine hundred fifty-two thousand, seven hundred forty".