28919654 has 4 divisors (see below), whose sum is σ = 43379484. Its totient is φ = 14459826.

The previous prime is 28919647. The next prime is 28919659. The reversal of 28919654 is 45691982.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28919659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7229912 + ... + 7229915.

It is an arithmetic number, because the mean of its divisors is an integer number (10844871).

Almost surely, 2^28919654 is an apocalyptic number.

28919654 is a deficient number, since it is larger than the sum of its proper divisors (14459830).

28919654 is a wasteful number, since it uses less digits than its factorization.

28919654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14459829.

The product of its digits is 155520, while the sum is 44.

The square root of 28919654 is about 5377.6996941071. The cubic root of 28919654 is about 306.9476863756.

The spelling of 28919654 in words is "twenty-eight million, nine hundred nineteen thousand, six hundred fifty-four".