28907023634 has 4 divisors (see below), whose sum is σ = 43360535454. Its totient is φ = 14453511816.

The previous prime is 28907023597. The next prime is 28907023657. The reversal of 28907023634 is 43632070982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16662937225 + 12244086409 = 129085^2 + 110653^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7226755907 + ... + 7226755910.

Almost surely, 2^28907023634 is an apocalyptic number.

28907023634 is a deficient number, since it is larger than the sum of its proper divisors (14453511820).

28907023634 is a wasteful number, since it uses less digits than its factorization.

28907023634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14453511819.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 28907023634 in words is "twenty-eight billion, nine hundred seven million, twenty-three thousand, six hundred thirty-four".