28993049690 has 32 divisors (see below), whose sum is σ = 57366429120. Its totient is φ = 10462441600.

The previous prime is 28993049663. The next prime is 28993049699. The reversal of 28993049690 is 9694039982.

It is a super-2 number, since 2×28993049690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28993049699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991595 + ... + 1020414.

It is an arithmetic number, because the mean of its divisors is an integer number (1792700910).

Almost surely, 2^28993049690 is an apocalyptic number.

28993049690 is a deficient number, since it is larger than the sum of its proper divisors (28373379430).

28993049690 is a wasteful number, since it uses less digits than its factorization.

28993049690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012158.

The product of its (nonzero) digits is 7558272, while the sum is 59.

The spelling of 28993049690 in words is "twenty-eight billion, nine hundred ninety-three million, forty-nine thousand, six hundred ninety".